A) 4.0 gm
B) 0.04 gm
C) 0.4 gm
D) 2.0 gm
Correct Answer: C
Solution :
\[0.1\ =\ \frac{x\ \times \ 1000}{40\ \times \ 100}\ \Rightarrow \ x\ =\ 0.45\ gms\].
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