Correct Answer - (i)A,(ii)A,(iii)B
(i). Stability of (c) and (a) is almost same, due to (a) has dancing resonance (hyper conjugation) & (c) is quasi aromatic species.
(ii) . (d) Resonance stabilises +Hyperconjugation
(c) Only one hyperconjugating structure will form
(b). Allylic free radical
(a). Vinylic (which is least stable)
(iii). Electron withdrawing group increases stability of carbanion.
