What is the name of the refrigerant that has the following characteristics? It is non-flammable, odourless, non-toxic, it does not have a corrosive effect on metal if water is present and at atmospheric pressure it has a boiling point of approximately -40.6°C.
a. Ammonia
b. R-22
c. R-744R
d. R-134a
e. R-290
Answer: B