Correct option is B
Given:
Initial Position: Facing West.
First Turn: Turns left and walks for x meters.
Second Turn: Turns right and walks for 22 meters.
Third Turn: Turns left and walks for 11 meters.
Fourth Turn: Turns left and walks for 22 meters.
From the given information following path diagram can be drawn-

The value of x = 21 - 11 = 10m.
Hence, the correct answer is 10m