Acetic acid $$(CH_3COOH)$$ is partially dimerised to $$(CH_3COOH)_2$$ in the vapour phase. At a total pressure of 0.200 atm, acetic acid is 92.0 percent dimerized at 298 K. The value of equilibrium constant of dimerisation under these conditions is

A

57.5

B

9.7

C

97

D

194