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.', 'role': 'assistant'}]