This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: recent papers  obst, Subject name: Gynaecology & Obstetrics
[{'content': 'Enlarged and pale placenta, is due to infection by _______ \nSelect and explain. \nA. Parvovirus, B. Measles, C. Syphilis, D. Toxoplasmosis', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Enlarged and pale placenta is due to infection by syphilis. Other clinical manifestations and complications include: Spontaneous aboion Stillbih Non-immune hydrops intrauterine Growth restriction Perinatal death Ref: Williams Obstetrics 25th edition Pgno: 1237', 'role': 'assistant'}]