This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General obstetrics, Subject name: Anatomy
During spermiogenesis, mitochondrion of spermatid forms which pa of the sperm 
Select and explain. 
A. Acrosomal cap, B. Middle piece, C. Axial filament, D. Head of the sperm
B: Middle piece
Answer: B: Middle piece 
Explanation: Nuclear body forms Head of the sperm Golgi body forms Acrosomal cap Mitochondrion forms Middle piece of sperm Microtubules form Axial filament of sperm.