Which of the statements are correct about the reactivities of alkene, alkynes, and arenes?

Options

A. (a) Ring (A) is more strained due to full double bond and is less stable than ring (B). Moreover, C atoms in ring (A) have more s character than those in ring (B), further making it less stable than ring (B). Hence, alkenes are more reactive towards EA reaction.
B. (b) EN of sp-hybridised C atom of alkynes is greater than `sp^2`-hybridised C atom of alkenes, which holds the `pi` electrons of alkynes more tightly. Moreover, there is a greater delocalisation of `pi` electrons (due to cylindrical nature) in alkynes than in alkenes. In alkenes, `pi bare`'s are less easily available for EA reactions than those in alkynes. So alkynes are less reactive than alkenes towards EA reactions.
C. (c) In alkynes, because of the cylindrical nature of their `pi`-bonds, approach by hydrogen along the axis of cylinder is more effective. Thus the transition state in alkynes is less strained. So alkynes react faster than alkenes with `H_2`.
D. (d) Arenes are more reactive towards EA reaction than alkenes and alkynes due to delocalisation of their `pibare's`.

Answer

A, B, C