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': 'Nonlmmune hydrops foetalis is seen In all except: \nSelect and explain. \nA. b - Thalassemia, B. Parvovirus-19, C. Rh-incompatibility, D. Chromosomal anomaly', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Rh-incompatibility', 'role': 'assistant'}]