Correct option is D
Given:
Mr. Z starts from Point Y and drives 12 km towards the north.
He then takes a left turn, drives 2 km, turns right and drives 1 km.
He then takes a left turn and drives 14 km.
He takes a final left turn, drives 13 km and stops at Point X.
From the given information path diagram will be.

14 + 2 = 16km
He far 16km and towards East direction should he drive in order to reach Point Y again.
Thus, correct option is (d).