The correct option is D 373 K
The temperature at which a liquid starts boiling is known as its boiling point.
The relation between Celsius (oC) and Kelvin (K) scale is as follows-
Kelvin = ∘C+273
The boiling point of water in Celcius scale is 100∘C.
So, the boiling point of water on Kelvin scale would be-
100∘C=273+100=373K