Which one of the following is the correct order of their boiling points in the descending order?

Question

Consider the following refrigerants

         1. Ammonia       2. Carbon dioxide       3. Dichlorodifluoro methane   4. Terafluoromethane

         Which one of the following is the correct order of their boiling points in the descending order?

         (a)  1 – 2 – 3 – 4             (b) 2 – 3 – 4 – 1  (c) 3 – 1 – 2 – 4       (d) 2 – 4 – 1 – 3