Frederick Banting was a Canadian medical scientist, doctor and Nobel laureate noted as one of the main discoverers of insulin. In 1923 Banting and John James Rickard Macleod received the Nobel Prize in Medicine, becoming the youngest recipient of the Nobel Prize in Physiology/Medicine till date.

Correct Option: A

Frederick Banting was a Canadian medical scientist, doctor and Nobel laureate noted as one of the main discoverers of insulin. In 1923 Banting and John James Rickard Macleod received the Nobel Prize in Medicine, becoming the youngest recipient of the Nobel Prize in Physiology/Medicine till date.

Nicolaus Copernicus discovered the Solar System. He was the first astronomer who formulated a comprehensive heliocentric cosmology in his book "De Revolutionibus Orbium Coelestium" (On the Revolutions of the Celestial Spheres), which displaced the Earth from the center of the universe.

Correct Option: C

Nicolaus Copernicus discovered the Solar System. He was the first astronomer who formulated a comprehensive heliocentric cosmology in his book "De Revolutionibus Orbium Coelestium" (On the Revolutions of the Celestial Spheres), which displaced the Earth from the center of the universe.

The concept of stored-program seals with storage of instructions in computer memory to enable it to perform a variety of tasks in sequence or intermittently. The idea was introduced in the late 1940s by John von Neumann.

Correct Option: A

The concept of stored-program seals with storage of instructions in computer memory to enable it to perform a variety of tasks in sequence or intermittently. The idea was introduced in the late 1940s by John von Neumann.

Antoine Henri Becquerel, a French physicist, was the discoverer of radioactivity along with Marie Sklodowska-Curie and Pierre Curie, for which all three won the 1903 Nobel Prize in Physics. Radioactivity refers to the particles which are emitted from nuclei as a result of nuclear instability.

Correct Option: B

Antoine Henri Becquerel, a French physicist, was the discoverer of radioactivity along with Marie Sklodowska-Curie and Pierre Curie, for which all three won the 1903 Nobel Prize in Physics. Radioactivity refers to the particles which are emitted from nuclei as a result of nuclear instability.

Lactometer is used to check purity of milk. The specific gravity of milk does not give a conclusive indication of its composition since milk contains a variety of substances that are either heavier or lighter than water. The device works on the principle of Archimedes’s principle that a solid suspended in a fluid will be buoyed up by a force equal to the weight of the fluid displaced.

Correct Option: B

Lactometer is used to check purity of milk. The specific gravity of milk does not give a conclusive indication of its composition since milk contains a variety of substances that are either heavier or lighter than water. The device works on the principle of Archimedes’s principle that a solid suspended in a fluid will be buoyed up by a force equal to the weight of the fluid displaced.