This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: AIIMS 2018, Subject name: Surgery
Sentinel lymph node biopsy is most useful for: 
Select and explain. 
A. Carcinoma cervix, B. Carcinoma endometrium, C. Carcinoma vulva, D. Carcinoma vagina
C: Carcinoma vulva
Answer: C: Carcinoma vulva 
Explanation: SLN biopsy is usually done in: CA breast, CA penis & Malignant melanoma SLN biopsy is also applied successfully in cancers of head & neck & vulva