This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Gestational Trophoblastic Disease, Subject name: Gynaecology & Obstetrics
True regarding vulval cancer is all except: 
Select and explain. 
A. HPV virus is a causative factor, B. Iliac group of nodes are primary site of metastasis, C. Smoking is a risk factor, D. Vulvectomy is the treatment for Bowen's disease
B: Iliac group of nodes are primary site of metastasis
Answer: B: Iliac group of nodes are primary site of metastasis 
Explanation: Ans. is 'b' i.e., Iliac group of nodes are primary site of metastasis o Has been explained in previous sessions