This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Breast Cancer - Types and Staging, Subject name: Surgery
[{'content': 'Features, which are evaluated for histological grading of breast carcinoma, include all of the following except - \nSelect and explain. \nA. Tumour necrosis, B. Mitotic count, C. Tubule formation, D. Nuclear pleomorphism', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e. Tumour Necrosis For histological grading of breast carcinoma three individual factors are assessed.Nuclear pleomorphism Tubule formation Mitotic countThe most commonly used histological grading system is Nottingham histologic score (also k/a Scarff-Bloom- Richardson)", 'role': 'assistant'}]