Answer: B
Correct answer: returned
Return already means to come or go back, so adding back repeats the idea. The correct form is simply he returned to his village. This is pleonasm - using more words than the sense requires - and English has a familiar set of such redundancies that examiners draw on: revert back, repeat again, reply back, join together, enter into a room, ascend up, descend down, connect together, final conclusion, free gift, new innovation, past history and advance planning. Most of them arise because the Latin prefix already carries the sense that the English particle repeats: re- means back, ad- means to, de- means down. Note that give back, come back and go back are perfectly correct, since those verbs carry no such prefix - the objection is to doubling, not to the word back itself.