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: Physiology
True about spermatid ? 
Select and explain. 
A. Derived from primary spermatocyte, B. Derived from secondary spermatocyte, C. Undergoes mitotic division, D. Undergoes meiotic division
B: Derived from secondary spermatocyte
Answer: B: Derived from secondary spermatocyte 
Explanation: Ans. is 'b' i.e., Derived from secondary spermatocyte