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&;s classification used for- \nSelect and explain. \nA. Carcinoma breast, B. Carcinoma prostate, C. Carcinoma pancreas, D. Carcinoma rectum', 'role': 'user'}, {'content': "Answer: B \nExplanation: Gleason's microscopic gradingsystem which is based on two features:i) Degree of glandular differentiation.ii) The 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,The TNM system is considered an international standard. HARSH MOHAN Textbook of pathology 6th edition pg no 720", 'role': 'assistant'}]