pyq/2016/csat/49

A person climbs a hill in a straight path from point ‘O’ on the ground in the direction of north-east and reaches a point ‘A’ after travelling a distance of 5 km. Then, from the point ‘A’ he moves to point ‘B’ in the direction of north-west. Let the distance AB be 12 km. Now, how far is the persons away from the starting point ‘O’?

(A) 7 km

(B) 13 km

(C) 17 km

(D) 11 km