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 21 year old primigravida presents with vaginal bleed after a period of amnorrhea. UPT shows +ve, USG shows snowstorm appearance. What can be the diagnosis? 
Select and explain. 
A. Hydatidiform, B. Endometriosis, C. Missed aboion, D. Ectopic pregnancy
A: Hydatidiform
Answer: A: Hydatidiform 
Explanation: Molar pregnancy is an abnormal form of pregnancy wherein a non-ble feilized egg implants in the uterus. There are two varieties of molar pregnancies, complete mole (no fetus), and incomplete mole (fetal pas in addition to molar degeneration.) Persistent or malignant disease will develop in approximately 20% of patients with molar pregnancy. The diagnosis is straight forward snow storm appearance in USG is characteristic of molar pregnancy.