Hyperconjugation involves delocalization of ___.

One of the irreversible impacts of electron displacement in the molecule is hyperconjugation.

The delocalization of sigma electrons in the carbon and hydrogen atoms in the molecule causes this hyperconjugation.

Delocalization of carbon-hydrogen sigma bond of an alkyl group directly attached to an atom of an unsaturated system and carbon-hydrogen sigma bond of an alkyl group directly attached to the positively charged carbon atom occurs during hyperconjugation.

Hence, the correct options are A and B, i.e. electrons of carbon-hydrogen σ bond of an alkyl group directly attached to an atom of unsaturated system, and electrons of carbon-hydrogen σ (sigma) bond of alkyl group directly attached to the positively charged carbon atom