Maximum enol content is in (a) (b) (c) (d)

The keto and enol forms are in dynamic equilibrium and they are known as tautomers. In enol group a double bond along with an alcohol group is present. The keto group with the highest number of carbons will be the one with maximum enol content. Option (a) 3 3 CH COCH . Number of alpha carbons = 2 Option (b) 3 2 3 CH COCH COCH . Number of alpha carbons = 3 Option (c) is not a ketone. So, no enol will come. Option (d) 3 2 CH COCH CHO . Number of alpha carbons = 2. Thus, the correct option is (b)