2014 · Q109
Deficiency of which of the following elements is responsible for weakening of bones?
- 1Calcium
- 2Phosphorus
- 3Nitrogen
- 4Carbon
Select the correct answer using the code given below.
General KnowledgeBiology
- A1 and 2 only
- B1 only
- C1, 2 and 3
- D4
Explanation
Bones are built of calcium and phosphorus; their deficiency weakens bones.