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': 'Hydrops foetalis is seen in following except : \nSelect and explain. \nA. Rh incompatibility, B. Syphilis, C. ABO incompatibility, D. CMV', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. is c i.e. ABO incompatibility', 'role': 'assistant'}]