• # question_answer 'Ciyogenics' is the study of A)  High temperatureB)  SuperconductorC)  Production of fuelsD)  Low temperature

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 -$150{{\,}^{o}}C$ $(123K;\,-238{{\,}^{o}}F)$.