The metal present in Vitamin B12 is
A. Iron
B. Manganese
C. Cobalt
D. Magnesium
Answer: Option C
A. Iron
B. Manganese
C. Cobalt
D. Magnesium
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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