This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: AIIMS 2019, Subject name: Gynaecology & Obstetrics
Sequential order of sperm formation: Spermatogonia Spermatocyte Spermatids Spermatozoa 
Select and explain. 
A. 2314, B. 3214, C. 3124, D. 1234
D: 1234
Answer: D: 1234 
Explanation: None