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(B) $1$. Intermediates are the local minima in the energy profile diagram between the reactant and product. Here,$P$ and $Q$ are the intermediates. So

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$2, 3, II$

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(B) $1$. Intermediates are the local minima in the energy profile diagram between the reactant and product. Here,$P$ and $Q$ are the intermediates. So,the number of intermediates is $2$.$2$. Activated complexes correspond to the peaks (maxima) in the energy profile diagram. There are $3$ peaks,so the number of activated complexes is $3$.$3$. The rate-determining step $(RDS)$ is the step with the highest activation energy $(E_a)$. Comparing the peaks,step $II$ has the highest activation energy. Therefore,step $II$ is the $RDS$.Thus,the correct values are: Number of intermediates $= 2$,Number of activated complexes $= 3$,$RDS = II$.

Consider the following reaction that proceeds from $A$ to $B$ in three steps as shown in the energy profile diagram. Choose the correct values for the following parameters:
$1$. Number of intermediates
$2$. Number of activated complexes
$3$. Rate determining step

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Consider the following reaction that proceeds from $A$ to $B$ in three steps as shown in the energy profile diagram. Choose the correct values for the following parameters:$1$. Number of intermediates$2$. Number of activated complexes$3$. Rate determining step