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 woman comes to you with vomiting and vaginal bleed. Fuher investigation reveals that she has a trophoblastic disease which has also burrowed into the myometrium. Histopathology showed evidence of chorionic villi. What is your diagnosis? 
Select and explain. 
A. Benign complete mole, B. Benign incomplete mole, C. Invasive mole, D. Choriocarcinoma
C: Invasive mole
Answer: C: Invasive mole 
Explanation: Benign mole whether complete or paial, doesn't invade the myometrium. Chorionic carcinoma will show no evidence of chorionic villus. A hydatidiform mole invading the myometrium is called an invasive mole. Ref: Shaw's textbook of gynaecology, edition 12, Page - 192.