Six family members, A, B, C, D, E and F, are working as a team on a family project of renovating a house. Each person has been given a single task. A is B's son and is in charge of 'flooring'. B is C's sister and is in charge of 'water issues'. C is D's wife and is in charge of 'electrical work'. D is in charge of 'foundation related work' and his son E is in charge of 'interior decoration'. F, who is D's brother, is in charge of 'roof'. What work is assigned to A's cousin?

A is B's son and is assigned the task of flooring.
B is C's sister and is responsible for water issues.
C is D's wife and is in charge of electrical work.
D is responsible for foundation-related work, and his son E is in charge of interior decoration.
F, who is D's brother, is responsible for the roof.

As per the Venn diagram, A and E are cousins because A is B’s son, and E is D’s son (B and D are related through C). 

 Therefore, Interior Decoration is assigned to A's cousin.

Thus, the Correct  option is  (a) Interior Decoration.