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
True about vit–D deficiency rickets –a) Vit. D3 given at a dose of 50–150 mg/dayb) X–ray knee joint is diagnosticc) Rickety rosary is tenderd) Increased chances of respiratory tract infectione) Hyponatrernia 
Select and explain. 
A. c, B. bd, C. ab, D. ac
B: bd
Answer: B: bd 
Explanation: None