don't have answer. Are you sure?
Obviously because of more strong inductive effect of cl which increases acidicity of cooh
how we can compare betwee B and C??
H has the least +I effect
Therefore it will destabilize the carbanion....
So c is more acid as -I effect of cl group will stabilize the carabanion
So c more acidic than b
and what about the inductive effect of alkyl group in C @ram_shukla
that alkyl group will also destablise the carbanion na
i think this question is data based ( given in ncert imo)