Two wires \( A \) and \( B \) are of same materials. Their length are in the ratio \( 3: 4 \) an...

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Two wires \( A \) and \( B \) are of same materials. Their length are in the ratio \( 3: 4 \) and diameters are in the ratio \( 5: 1 \) when stretched by force \( F A \) and \( F B \) respectively they get equal increase in their lengths. The ratio of \( F B / F A \) is.
(a) 0.01
(b) 0.03
(c) 0.04
(d) 0.05
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