Read the following paragraph and answer the question given below:
Freezing point of benzene is 278.4K and heat of fusion of benzene is 10.042 KJ/mol. Acetic acid exists partly as dimer in benzene solution. The freezing point of 0.02 mol fraction of acetic acid in benzene is 277.4 K.
The equilibrium constant for dimerisation of acetic in benzene is

Options

A. 2.4
B. 3.39
C. 2.42
D. 2.56

Answer

B