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: Anatomy
[{'content': 'In an adult male, on per rectal examination, the following structures can be felt anteriorly except: \nSelect and explain. \nA. Internal iliac lymph nodes, B. Bulb of the penis, C. Prostate, D. Seminal vesicle when enlarged', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Internal iliac lymph nodes can be palpated laterally when they are enlarged & not anteriorly Ref: Anatomy Workbook By Colin Hinrichsen, Peter Lisowski, 2007, Page 103', 'role': 'assistant'}]