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1636. The spring balance works on the principle of
A. Boyles law
B. Hookes law
C. Bernoullis principle
D. Pascals law
Explanation:
1637. The gland, which in relation to body size is largest at brith and then gradually shrinks after puberty, is
A. Thyroid
B. Pituitary
C. Thymus
D. Adrenal
Explanation:
1638. Life of RBC in human blood is of
A. 30 days
B. 60 days
C. 120 days
D. 15 hours
Explanation:
1639. Tetraethyl lead is used as
A. mosquito repellent
B. pain killer
C. fire extinguisher
D. petrol additive
Explanation:
1640. The gas used to extivguish fire, is
A. neon
B. nitrogen
C. carbon dioxde
D. carbon monoxide
Explanation:
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