This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: miscellaneous, Subject name: Pathology
[{'content': 'Gleason scoring is used for- \nSelect and explain. \nA. Carcinoma testis, B. Carcinoma colon, C. Carcinoma thyroid, D. Carcinoma prostate', 'role': 'user'}, {'content': "Answer: D \nExplanation: Gleason's microscopic grading system which is based on two features:i) Degree of glandular differentiation.ii) Growth pattern of the tumor in relation to the stroma.These features are assessed by low-power examinationof the prostatic tissue. For clinical staging of prostate cancer,TNM system is considered an international standard. HARSH MOHAN Textbook of pathology 6th edition pg no 720", 'role': 'assistant'}]