This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General obstetrics, Subject name: Gynaecology & Obstetrics
Which of the following is a non-molar trophoblastic neoplasm? 
Select and explain. 
A. Complete hydatidiform mole, B. Paial hydatidiform mole, C. Invasive mole, D. Choriocarcinoma
D: Choriocarcinoma
Answer: D: Choriocarcinoma 
Explanation: GTD histologically is divided into hydatidiform moles, which are characterized by the presence of villi, and non-molar trophoblastic neoplasms, which lack villi.Nonmolar trophoblastic neoplasms include choriocarcinoma, placental site trophoblastic tumor,and epithelioid trophoblastic tumor.Reference: William&;s Obstetrics; 25th edition; Chapter 20; Gestational trophoblastic diseases