This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology, Subject name: Physiology
Number of ovum at bih is 
Select and explain. 
A. 2-3 million, B. 2-5 million, C. 7-10 million, D. 10-15 million
A: 2-3 million
Answer: A: 2-3 million 
Explanation: In humans no ova formed after bih. at time of bih there are 2 million ova.Ref: Ganong&;s review of medical physiology; 24th edition; page no: 401