Which of the following alcohols is expected to have the lowest pKa value?

Given data:
It is given to identify the alcohol that is expected to have the lowest pKa value.
Explanation:

2,2,2-Trifluoroethanol is the organic compound which has the formula $C{F}_{3}C{H}_{2}OH$. Also known as TFE or trifluoromethyl alcohol, this colorless, water-miscible liquid has a smell reminiscent of ethanol.

Since fluorine has a stronger influence than chlorine, 2,2,2-trifluoroethanol has the lowest $pKa$ value. 

Hence, the correct option is option (C) 2,2,2-Trifluoroethanol.