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: Orthopaedics
12 year old with rapid increase in weight and Height over past one year presents with difficulty in sitting cross legged and squatting, knee would go into axilla every time she flexes her hip and knee, most likely diagnosis 
Select and explain. 
A. Hyperthyroidism, B. Slipped capital femoral epiphysis, C. Perthe's disease, D. Hip dislocation
B: Slipped capital femoral epiphysis
Answer: B: Slipped capital femoral epiphysis 
Explanation: None