Match the reaction the driving force of the reaction.

Explanation

A-p,q
B-q,s
C-q,r
D-p,q
a) and d)` NO_2`-, and CN· are ambident nucleophiles.
b) `S_N2` is bimolecular nucleophilic substitution reaction, involving transition state where the nucleophile attacks from the side opposite to the leaving group, thus leading to inversion.
c) `S_N1` is unimolecular nucleophilic substitution reaction involving carbocation as reaction intermediate.