This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Surgery
A patient has 2 months POP cast for tibial fracture of left leg. Now he needs mobilisation with a single crutch. You will use this crutch on which side: 
Select and explain. 
A. Left side, B. Right side, C. Any side, D. Both side
B: Right side
Answer: B: Right side 
Explanation: B i.e. Right side