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: Dental
[{'content': 'Absence of sesamoid bone in girl of age about normal range of puberty is said to have: \nSelect and explain. \nA. Completed the growth, B. Overgrowth, C. Delay in reaching puberty, D. All of the above', 'role': 'user'}, {'content': 'Answer: C \nExplanation: PHV-Peak height velocity occurs approximately\xa0at 12 years in girls and 14 years in boys and ossification\xa0of ulnar sesamoid of hand occurs roughly 6 months before\xa0the PHV.\xa0\nKey Concept:\xa0\nThe absence or delayed presence of sesamoid bone is due to delay in reaching puberty.', 'role': 'assistant'}]