Option B - Cl\(_2\) + 2NaF → 2NaCI + F\(_2\)  is not feasible. Meaning the reaction cannot take place.

Here is why:

The reaction implies Chlorine is more reactive than Fluorine, hence it can displace F from the NaF. This is not true because Fluorine is more reactive than Chlorine, hence a less reactive element like Chlorine cannot displace a more reactive element like Fluorine. Hence the reaction is not feasible ( not possible).