In the following reactions, $\mathbf{P}, \mathbf{Q}, \mathbf{R}$, and $\mathbf{S}$ are the major products.




The correct statement about $\mathbf{P}, \mathbf{Q}, \mathbf{R}$, and $\mathbf{S}$ is :

The major product formed in the following reaction of

KI in acetone undergoes S_N2 reaction with each of P, Q, R and S. The rates of the reaction vary as

The major product of the following reaction is: