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: Pathology
[{'content': 'A disease occurring before 65 yr of age is termed as: September 2007 \nSelect and explain. \nA. Senile, B. Pre senile, C. Post adolescent, D. Post senile', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. B: Pre senile', 'role': 'assistant'}]