Correct option is B
Given,
Bishal starts from Point A and drives 18 km towards south.
He then takes a left turn, drives 17 km, turns left and drives 19km.
He then takes a left turn and drives 18 km.
takes a final left turn, drives 1 km and stops at Point P.
From the given information possible Direction will be:

So, Shortest distance = 1 km to the east.
Thus, the correct option is: (b)