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
Absence of sesamoid bone in girl of age about normal range of puberty is said to have: 
Select and explain. 
A. Completed the growth, B. Overgrowth, C. Delay in reaching puberty, D. All of the above
C: Delay in reaching puberty
Answer: C: Delay in reaching puberty 
Explanation: PHV-Peak height velocity occurs approximately at 12 years in girls and 14 years in boys and ossification of ulnar sesamoid of hand occurs roughly 6 months before the PHV. 
Key Concept: 
The absence or delayed presence of sesamoid bone is due to delay in reaching puberty.