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Consider the following first order competing reactions:
\( \mathrm{P} \) \( \mathrm{X} \stackrel{\mathrm{k}_{1}}{\longrightarrow} \mathrm{A}+\mathrm{B} \) and \( \mathrm{Y} \stackrel{\mathrm{k}_{2}}{\longrightarrow} \mathrm{C}+\mathrm{D} \)

W if \( 50 \% \) of the reaction of \( X \) was completed when \( 96 \% \) of the reaction of \( \mathrm{Y} \) was completed, the ratio of their rate constants \( \left(\frac{\mathrm{k}_{2}}{\mathrm{k}_{1}}\right) \) is
(1) \( 4.06 \)
(2) \( 0.215 \)
(3) \( 1.1 \)
(4) \( 4.65 \)
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