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: Psychiatry
[{'content': 'Presenilin - 1 gene is present on : \nSelect and explain. \nA. Chromosome 1, B. Chromosome 2, C. Chromosome 14, D. Chromosome 21', 'role': 'user'}, {'content': "Answer: C \nExplanation: Presenilin - 1 is present on\xa0Chromosome 14 &\xa0Presenilin - 2\xa0\xa0is present on\xa0Chromosome - 1. Both are associated with Alzheimer's disease.", 'role': 'assistant'}]