This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Musculoskeletal system, Subject name: Pathology
[{'content': 'When is peak bone mass achieved among the following? \nSelect and explain. \nA. Infancy, B. Early adolescence, C. Early adulthood, D. Early foies', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Peak bone mass is achieved in early adulthood after the cessation of skeletal growth. This set point is determined by a variety of factors, including polymorphisms in the receptors for vitamin D and LRP5/6, nutrition, physical activity, age, and hormonal status. Beginning in the fouh decade, however, resorption exceeds formation, so there is a steady decline in skeletal mass.Robbins Pathology 9e pg: 1183', 'role': 'assistant'}]