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
A pregnant female delivered a baby with normal expulsion of an intact placenta. After half hour she staed bleeding per vaginaly. On examination she was hypotensive and boggy mass is palpated per abdomen. USG showed retained placental tissues. what is the likely diagnosis? 
Select and explain. 
A. Placenta succenturiata, B. Adenomyosis, C. Placenta accreta, D. Membranous placenta
A: Placenta succenturiata
Answer: A: Placenta succenturiata 
Explanation: Ans: A. Placenta succenturiataRef: DC Dutta's tubook of Obstetrics, gh ed.Placenta succenturiata has one (usual) or more small lobes of placenta placed at a varying margin from the main placental margin.A leash of vessels connects the small lobe with the main lobe.Many times, succenturiate is retained and it presents as postpaum hemorrhage which may be primary or secondary.