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
Enlarged and pale placenta, is due to infection by _______ 
Select and explain. 
A. Parvovirus, B. Measles, C. Syphilis, D. Toxoplasmosis
C: Syphilis
Answer: C: Syphilis 
Explanation: 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