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: Medicine
All of the following are seen in rockets, except - 
Select and explain. 
A. Bow legs, B. Gunstock deformity, C. Pot belly, D. Cratio tabes
B: Gunstock deformity
Answer: B: Gunstock deformity 
Explanation: None