Directions:- Study the following information carefully to answer the question given below.
There is a group of six persons A, B, C, D, E and F. Among them there are two married couples. F is the sister of D. In this group, one is the gardener whose son is E. C is the grandfather of E. D is married to A. A is a driver. Both ladies of the group are unemployed.
Who is the gardener?