This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Breast, Subject name: Anatomy
[{'content': 'Molecular classification of breast cancer is based on which of the following \nSelect and explain. \nA. Gene expression profiling, B. Expression of hormone receptors like ER, PR and HER-2 neu, C. Histology, D. Response to chemotherapy', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Refer Robbins page no 1061 Invasive carcinoma can be divided based on molecular and morpholog characteristic into several clinically impoant subgroups. Breast carcinoma have a wide variety of morphological apperance.One third can be classified morphologically into special histologic types some of which are strongly assosciated with clinically relevant biologic characteristic', 'role': 'assistant'}]