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: Gynaecology & Obstetrics
Life span of neonatal RBC is : 
Select and explain. 
A. 120 days, B. 100 days, C. 6 months, D. One year
B: 100 days
Answer: B: 100 days 
Explanation: 100 days