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Option: C
Explanation :Marcian Edward “Ted” Hoff Jr. (born October 28, 1937 in Rochester, New York) is one of the inventors of the microprocessor.

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Option: A
Explanation :Edward Teller was a Hungarian-American theoretical physicist who is known colloquially as “the father of the hydrogen bomb”, although he did not care for the title. He made numerous contributions to nuclear and molecular physics, spectroscopy and surface physics.

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Option: B
Explanation :Penicillin was discovered in 1928 by Scottish scientist Alexander Fleming. People began using it to treat infections in 1942. There are several enhanced penicillin families which are effective against additional bacteria; these include the antistaphylococcal penicillins, aminopenicillins and the antipseudomonal penicillins. They are derived from Penicillium fungi.

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Option: D
Explanation :Discovered in 1928 and put to use to cure infections in 1942 this is arguably the most important drug discovery in the history of medicine. It began the era of antibiotics and ushered in advances in therapeutic medicine. In fact, there’s a good chance you wouldn’t be reading this if not for the drug, as it likely prevented an infection in yourself or one of your ancestors.
The U.S. Centers for Disease Control and Prevention estimates that antibiotic resistance is responsible for more than 2 million infections and 23,000 deaths each year.
Some other Wonder Drugs are Aspirin, Viagra, Birth control pill, Lipitor, Insulin, Thorazine, HN-2/Mechlorethamine, AZT, Ritalin

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Option: C
Explanation :On November 7, 1867, the woman the world would know as Marie Curie was born as Maria Sklodowska in what is now modern-day Poland.
Pierre(Marie Curie husband) and Marie Curie set about working to search for the unknown element. They ground up samples of pitchblende, dissolved them in acid, and began to separate the different elements present, using the standard analytical chemistry techniques of the time. Eventually, they extracted a black powder 330 times more radioactive than uranium, which they called polonium. Polonium was a new chemical element, atomic number 84. When the Curies investigated further, they found that the liquid left behind after they had extracted polonium was still extremely radioactive. They realised that pitchblende contained another new element, far more radioactive than polonium, but present in even smaller quantities. In 1898, the Curies published strong evidence supporting the existence of the new element – which they called radium but they still had no sample of it. Pitchblende is an expensive mineral, because it contains valuable uranium, and Marie needed a lot of it.In 1902 Marie eventually isolated radium (as radium chloride), determining its atomic weight as 225.93. The journey to the discovery had been long and arduous.

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Option: C
Explanation :Cellophane is a thin, transparent sheet made of regenerated cellulose. Its low permeability to air, oils, greases, bacteria, and water makes it useful for food packaging.As well as food packaging, cellophane is used in transparent pressure-sensitive tape, tubing and many other similar applications.
Cellophane was invented by Swiss chemist Jacques E. Brandenberger. It took ten years for Brandenberger to perfect his film. His chief improvement over earlier work with such films was adding glycerin to soften the material. By 1912 he had constructed a machine to manufacture the film, which he had named Cellophane, from the words cellulose and diaphane (“transparent”).

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Option: B
Explanation :In 1885, two German inventors Gottlieb Daimler and Wilhelm Maybach managed to produce first modern model of motorcycle. They managed to attach small petroleum based combustion engine to the wooden bicycle frame. This motorcycle called “Daimler Reitwagen” is today regarded as the first true motorcycle and it was a starting point for all future motorcycle based innovations and improvements.
During the one of the first test runs seat of the motorcycle caught fire from the heat emanated from the nearby engine. Daimler and Maybach patented during August 1885, and the final version of “Reitwagen” was presented to the public in 1886.
Original models of the “Daimler Reitwagen” were sadly lost in 1903 factory fire at Cannstatt, Germany. Several replicas exist in museum collections in Germany, USA, Australia and Japan.

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Option: A
Explanation :No explanation is available for this question. To view user comments or add your comments please Click Here..

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Option: B
Explanation :The IR which stands for the instruction register contains the last instruction fetched.
The instruction register (IR) or current instruction register (CIR) is the part of a CPU’s control unit that holds the instruction currently being executed or decoded.
An instruction register holds a machine instruction that is currently being executed. In general, a register sits at the top of the memory hierarchy. A variety of registers serve different functions in a central processing unit (CPU) – the function of the instruction register is to hold that currently queued instruction for use.
All the others options are registers which are used for the fetch operation.

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Option: D
Explanation :A graphics drawing tablet used for sketching new images or tracing old ones. Also called a “graphics tablet,” the user contacts the surface of the device with a wired or wireless pen or puck. Often mistakenly called a mouse, the puck is officially the “tablet cursor.”

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