This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Gynaecological Disorders in Obs., Subject name: Gynaecology & Obstetrics
The following primary tumors are common in the vulva except: 
Select and explain. 
A. Adenocarcinoma, B. Basal cell carcinoma, C. Choriocarcinoma, D. Squamous cell carcinoma
C: Choriocarcinoma
Answer: C: Choriocarcinoma 
Explanation: Ans. is c, i.e. ChoriocarcinomaRef: Dutta Gynae 6th/ed, p334Histological types of vulval cancers* Squamous cell carcinoma-90%* Melanoma 5%* Adenocarcinoma (Bartholin's gland)* Basal cell carcinoma* Sarcoma