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Question
Cryogenics is:
Options:
A .  Study of heat
B .  Study of genesis
C .  Scientific study of very low temperatures
D .  A scientific study of dust
Answer: Option C
Answer: (c)
In physics, cryogenics is the study of the production and behaviour of materials at very low temperatures.
It is not well-defined at what point on the temperature scale refrigeration ends and cryogenics begins, but scientists assume it starts at or below –150 °C (123 K; –238 °F).

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