This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Avascular Necrosis, Subject name: Orthopaedics
Osgood schlatters disease involves? 
Select and explain. 
A. Tibial tuberosity, B. Femoral condyle, C. Lateral malleolus, D. Medial malleolus
A: Tibial tuberosity
Answer: A: Tibial tuberosity 
Explanation: Ans. (a) Tibial tuberosityRef.-.Apley's system of orthopaedics and fractures edited by Louis Solomon, dividwarwicky selvadurainayagam 9/e, p 575-576y 887)