Which one of the following vitamins is essential for coagulation of blood?
A. Vitamin-A
B. Vitamin-B12
C. Vitamin-K
D. Vitamin-D
Answer: Option C
A. Vitamin-A
B. Vitamin-B12
C. Vitamin-K
D. Vitamin-D
Answer: Option C
The fibers, such as nylon and polyester, that are made from chemical substances are called:
A. Natural fibres
B. Wool
C. Synthetic fibres
D. Silk
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