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
Commonest site of march # is - 
Select and explain. 
A. Involves shaft of 2 & 3rd metatarsals, B. Avulsion # of 5th metatarsals, C. Calcaneus involved, D. Olecranon involved
A: Involves shaft of 2 & 3rd metatarsals
Answer: A: Involves shaft of 2 & 3rd metatarsals 
Explanation: March fracture is fatigue (stress) fracture of metatarsals.
The fracture usually affects the shaft or neck of the second and third metatarsal bone.