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: Orthopaedics
If the head of the radius is removed, it will result in : 
Select and explain. 
A. Lengthening of limb, B. Valgus deformity, C. Varus deformity, D. No deformity
B: Valgus deformity
Answer: B: Valgus deformity 
Explanation: Complications of radial head excision in children :

Proximal migration of radius with inferior radio - ulnar (distal radio - ulnar) joint instability.
Postero - lateral instability.
Cubitus valgus deformity.