| P: It is required for proper functioning of thyroid gland. |
| Q: It helps in maintaining body's water balance, |
| R: It is important for haemoglobin formation. |
| S: It strengthens bones and teeth and helps in blood clotting. |
A) Deficiency of P causes dryness of eyes and inflammation of tongue,
B) O is also required for the proper functioning of nervous system.
C) (c) Deficiency of R causes goitre.
D) (d) S also helps to fight infections and keeps skin and mouth healthy.
Correct Answer: B
Solution :
In the given statements, P, Q, R and S refer to iodine, sodium, iron and calcium, respectively. Sodium maintains fluid balance in the body. Sodium is also required for proper nerve functioning.
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