This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Metabolic Disorders of Bone, Subject name: Orthopaedics
Genu recurvatum is seen in: 
Select and explain. 
A. Rheumatoid ahritis, B. Poliomyelitis, C. Rickets, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: Genu Recurvatum or hyperextension of knee is seen in: Trauma R.A Rickets Poliomyelitis Charcots Congenital (Due to Intrauterine positioning) - self resolving