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
Fetal blood cells in mother is diagnosed by : 
Select and explain. 
A. Direct Coomb's, B. Indirect Coomb's, C. Amniocentesis, D. Placental sampling
B: Indirect Coomb's
Answer: B: Indirect Coomb's 
Explanation: Indirect Coomb's