This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Osteology, Subject name: Anatomy
[{'content': "Wolff's law is:- \nSelect and explain. \nA. Epiphyseal centre which appears first unites last with diaphysis, B. Epiphyseal centre which appears first unites first with diaphysis., C. Osteogenesis is directly propoional to stress and strain., D. None of above.", 'role': 'user'}, {'content': "Answer: C \nExplanation: 1) Wolff's law:- osteogenesis is directly propoional to stress and strain. 2) Law of union of epiphysis:- The epiphysis which appears first unites last with the diaphysis and vice versa. In fibula, the law is violated.", 'role': 'assistant'}]