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: Pediatrics
Most common cause of genu valgum in children is ? 
Select and explain. 
A. Osteoahritis, B. Rickets, C. Paget disease, D. Rheumatoid ahritis
B: Rickets
Answer: B: Rickets 
Explanation: Ans. is 'b' i.e., Rickets o Genu valgum (also known as knock knee) is a condition where knees are abnormally approximated and ankles are abnormally divergent. o It is caused due to softening of bones or damage to lateral Femoral epiphysis Out of given options ? o Most common cause in children is Rickets. o Other diseases given in option are seen in elderly.