The correct option is
D all of the above
Hyperconjugation is the stabilizing interaction that results from the interaction of the electrons in a bond (usually C-H or C-C) with an adjacent empty or partially filled p-orbital or a -orbital to give an extended molecular orbital that increases the stability of the system.
Conjugated system has alternate σ and π bonds.
Hyperconjugation is a delocalization of σ and π bonds.
As a result, it ends in addition to bonds where there is no bond between C and H.
Therefore, it is also called no bond resonance.
Hence, all the options are correct.
![52274_24246_ans_f04c19c8c430457e9c815ea8dde3e4fe.png](https://search-static.byjusweb.com/question-images/toppr_ext/questions/52274_24246_ans_f04c19c8c430457e9c815ea8dde3e4fe.png)