Sentence Correction - Verbal and Reasoning

Directions to SolveWhich of phrases given below each sentence should replace the phrase printed inboldtype to make the grammatically correct? If the sentence is correct as it is, mark 'E' as the answer.
Q1:

The man to who I sold my house was a cheat.

A to whom I sell

B to who I sell

C who was sold to

D to whom I sold

E No correction required

ANS:D - to whom I sold

No answer description is available.