This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Fertilization and Development of Embryo, Subject name: Anatomy
Spermatogonium to Spermatozoon: 
Select and explain. 
A. 64 days, B. 74 days, C. 84 days, D. 94 days
B: 74 days
Answer: B: 74 days 
Explanation: Ans. (b) 74 daysRef: I.B. Singh 9th ed. /14-15