Correct option is A
Given:
Neetu steps out from her classroom and walks 25 meters east.
She takes a right turn and walks 20 meters.
She takes a right turn again and walks 62 meters.
Again, she takes a right turn and walks 91 meters.
She takes a right turn again and walks 62 meters.
She takes a right turn again and walks 35 meters.
She takes a right turn again and walks 25 meters.
She takes a final right turn and walks 15 meters to reach point X
From the given information following path diagram can be drawn-

From the above diagram the distance between his Classroom and the point X = 91m - ( 55m-15m) = 91- 40 = 51m
Direction- North
Thus, correct answer is (a) 51m, North