The hyperconjugative stabilities of tert-butyl cation and 2-butene, respectively, are due to

Options

A. `sigmararrp` (empty) and `sigmararrpi^("*")` electron delocalisatons.
B. `sigma rarrsigma^("*") and sigma rarrpi` electron delocalisations.
C. `sigma rarrp` (filled ) `sigma rarrpi` electron delocalisations.
D. p (filled ) `rarr sigma^("*") and sigma rarrpi^("*")` electron delocalisations.

Answer

A