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
[{'content': "In Rh incompatibility, the prognosis depends on : \nSelect and explain. \nA. Serum bilirubin, B. Coomb's test, C. Blood smear, D. Serum albumin", 'role': 'user'}, {'content': 'Answer: A \nExplanation: Serum bilirubin', 'role': 'assistant'}]