This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Pregnancy in Rh-negative Women, Subject name: Gynaecology & Obstetrics
[{'content': 'Test to detect maternal sensitization - \nSelect and explain. \nA. Direct coombs test, B. Indirect coombs test, C. Both, D. None', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Indirect coombs test", 'role': 'assistant'}]