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The hyperconjugative stabilities of tert...

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

A

`sigma rarrp` (empty) and `sigma rarr pi^(**)` electron delocalisations.

B

`sigma rarr sigma^(**) and sigma rarrpi` electron delocalisations.

C

`sigma rarrp` (filled) ad `sigma rarr pi` electron delocalisations.

D

p(filled ) `rarr sigma^(**) and sigma rarrpi^(**)` electron delocalisations.

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A
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