This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Growth, Development, and Behavior, Subject name: Pediatrics
An afebrile, obese 14-year-old boy has developed pain at the right knee and a limp. Select the most likely diagnosis 
Select and explain. 
A. Legg-Calve-Perthes disease, B. Slipped capital femoral epiphysis, C. Osteomyelitis, D. Septic arthritis of the hip
B: Slipped capital femoral epiphysis
Answer: B: Slipped capital femoral epiphysis 
Explanation: Slipped capital femoral epiphysis is a disease of unknown etiology and occurs typically in adolescents; the disorder is most common among obese boys with delayed skeletal maturation or in thin, tall adolescents having recently enjoyed a growth spurt. Onset of this disorder is frequently gradual; pain referred to the knee in 20% of cases can mask the hip pathology.