The dimensions of two wires \( A \) and \( B \) are the same. But their materials are different....

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The dimensions of two wires \( A \) and \( B \) are the same. But their materials are different. Their load-extension graphs are shown. If \( Y_{A} \) and \( Y_{B} \) are the values of Youngs modulus of elasticity of \( A \) and \( B \) respectively then
(a) \( Y_{A}Y_{B} \)
(b) \( Y_{A}Y_{B} \)
(c) \( Y_{A}=Y_{B} \)
(d) \( Y_{B}=2 Y_{A} \)
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