The thermodynamic property that measures the extent of molecular disorder is called entropy. Entropy change of phase transformation can be calculated using Trouton's formula `(DeltaS = DeltaH//T)`. In the reversible adiabatic process, however, `DeltaS` will be zero. the rise in temperature in isobaric and isochoric conditions is found to increase the randomness or entropy of the system.
`DeltaS = 2.303 C log (T_(1)//T_(2))`
The melting point of a solid is `200K` and its latent heat of fusion is `400cal mol^(-1)`. The entropy changes for the fusion of `1` mole of the solid (in cal `K^(-1))` at the same temperature would be

Options

A. `800`
B. `2`
C. `0.2`
D. `80`