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: Radiology
[{'content': 'Hypoechoic lesion within prostate in USG seen in – a) Adenocarcinomab) Normal prostate tissuec) Infertilityd) Urethral obstructione) BPH \nSelect and explain. \nA. a, B. b, C. ab, D. ae', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Most of the prostatic carcinomas (adenocarcinomas) are lzypoechoic, but may be hyperechoic or isoechoic.\nEchogenicity of BPH varies, it may be diffusely homogeneous and hypoechoic or hyperechoic, but some degree of inhomogeniety is noted in most cases.', 'role': 'assistant'}]