Deficiency of which one of the following cause knock-knee. bow legs and pigeon chest in children

Deficiency of which one of the following cause knock-knee. bow legs an

1.	Deficiency of which one of the following cause knock-knee. bow legs and pigeon chest in children
A.	Vitamin A
B.	Vitamin B
C.	<sub>2</sub>
D.	Vitamin D
E.	Vitamin E
Answer» D. Vitamin D