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
Life span of neonatal RBC ? 
Select and explain. 
A. 60-90 days, B. 90-120 days, C. 120-150 days, D. 150-200 days
A: 60-90 days
Answer: A: 60-90 days 
Explanation: Ans. is 'a' i.e., 60-90 days