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: Forensic Medicine
[{'content': "Fetomaternal transfusion of fetal RBCs in mother can be detected by: UPSC 08; TN 08; AIIMS 10 \nSelect and explain. \nA. Direct Coomb's test, B. Betke-Kleihauer test, C. Electrophoresis, D. Indirect Coomb's test", 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. Betke-Kleihauer test', 'role': 'assistant'}]