On Fahrenheit scale, the boiling point of water is:

On the Fahrenheit scale, the freezing point of water is $32^{\circ }F$ and the boiling point is $212^{\circ }F$ (at standard atmospheric pressure).
Fahrenheit to Celsius : $(F-32)\ast 1.8=C$
Boiling point of water is 100 degree C. Then, $F=(100\ast 1.8)+32$ = $212^{\circ }F$
Option C is correct.