Correct option is A
Given:
Mr. Oxi starts from Point A and drives 9 km towards the south.
He then takes a right turn and drives 3 km, then turns right and drives 15 km.
He then takes a right turn and drives 11 km.
He takes a final right turn, drives 6 km and stops at Point P.
From the given information path diagram will be.

11 - 3 = 8km
He far 8km and in West direction should he drive in order to reach Point A again.
Thus, correct option is (a).