A 12 year old with rapid increase in weight and height over the past one year presents with difficulty in sitting cross legged and squatting.The knee would go into axilla every time she flexes her hip and knee.The most likely diagnosis is:

• A. Slipped Capital Femoral Epiphysis
• B. Perths disease
• C. Synovitis of knee
• D. Congenital Coxa Vera