This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Unknown
[{'content': 'The gene for the disease with following features is localized to chromosome: \nSelect and explain. \nA. 11q, B. 12p, C. 21p, D. 18q', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]