Hyperconjugation involves delocalisation of.....

Options

A. electrons of carbon-hydrogen `sigma` bond of an alkyl group directly attached to an atom of unsaturated system.
B. electrons of carbon-hydrogen `sigma` bond of alkyl group directly attached to the positively charged carbon atom.
C. `pi`-electrons of carbon-carbon bond
D. lone pair of electrons

Answer

A, B

Explanation

(a) and (b) are both correct. For details, consult section 12.25.