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: Surgery
Inguinal lymphnode enlargement is seen in ? 
Select and explain. 
A. Seminoma testis, B. Malignant melanoma foot, C. Ca cervix, D. None
B: Malignant melanoma foot
Answer: B: Malignant melanoma foot 
Explanation: Ans. is 'b' i.e., Malignant melanoma foot