This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology and breast, Subject name: Surgery
[{'content': 'BRCA 1 gene is located on \nSelect and explain. \nA. 11q, B. 13q, C. 17q, D. 19q', 'role': 'user'}, {'content': 'Answer: C \nExplanation: BRCA1 (on chromosome 17q21) and BRCA2 (on chromosome 13q12.3) are both large genes, and hundreds of different mutations distributed throughout their coding regions have been associated with familial breast cancers.Ref: Robbins; 9th edition; Chapter 23; The Breast; Page no: 1054', 'role': 'assistant'}]