This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Urology, Subject name: Surgery
[{'content': 'Which one of the following does not indicate good prognosis in Ca penis \nSelect and explain. \nA. Size less than 2 cm, B. No regional lymph node metastasis, C. No invasion of subepithelial connective tissue, D. No metastases', 'role': 'user'}, {'content': 'Answer: A \nExplanation: It is not the size of the tumor but the invasion of the lesion into the corpora or overlying facial layers, which are prognostic indicator.', 'role': 'assistant'}]