This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Identification - Medicolegal aspects, Subject name: Forensic Medicine
[{'content': 'Fusion of xiphoid process occurs at? \nSelect and explain. \nA. 30 years, B. 10 years, C. 40 years, D. 70 years', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. (c) 40 yearsRef: Textbook of Forensic medicine and Toxicology: Principles and Practice, 5/e, p 43', 'role': 'assistant'}]