This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Embryology, Subject name: Anatomy
[{'content': 'Head of sperm is derived from: \nSelect and explain. \nA. Golgi Body., B. Nucleus, C. Mitochondria., D. Centromere', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. B. NucleusThe spermatozoon consists of head, neck, and tail. The tail is further divided into three parts: middle piece, principle piece, and end piece.a. The head mainly consists of a nucleus that contains the condensed chromatin material (mostly DNA).b. Anterior two-third of the nucleus is covered by an acrosomal cap that contains various enzymes including hyaluronidase and acrosin.c. Neck contains a funnel-shaped basal plate and a centriole. The centriole gives rise to axial filament that extends throughout the tail.d. Middle piece contains the axial filament in the center that is surrounded by spirally arranged mitochondrial sheath.', 'role': 'assistant'}]