It takes 40 minutes for the completion of \( 50 \% \) of the reaction \( \mathrm{A} \rightarrow ...

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It takes 40 minutes for the completion of \( 50 \% \) of the reaction \( \mathrm{A} \rightarrow \) Products. For the completion of next \( 50 \% \) of the reaction, the time taken is 80 minutes. The order of the reaction is
(a) 2
(b) 0
(c) 3
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