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UPSC CDS Science Biology Questions Part 1

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Question : 100

Total: 100

Deficiency of which of the following elements is responsible for weakening of bones?
1. Calcium
2. Phosphorus
3. Nitrogen
4. Carbon
Select the correct answer using the code given below.

1 and 2 only
1 only
1, 2 and 3
4 only

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