Which one is the correct order of acidity-

Options

A. `HC-=CHgtCH_3-C-=CHgtCH_2=CH_2gtCH_3-CH_3`
B. `HC-=CHgtCH_2=CH_2gtCH_3-C-=CHgtCH_3-CH_3`
C. `CH_3-CH_3gtCH_2=CH_2gtCH_3-C-=CHgtHC-=CH`
D. `CH_2=CH_2gtCH_3CH=CH_2gtCH_3-CH_3gtHC-=CH`

Explanation

For a C-atom in hybridised state, acidic character increases with increase of the s-character. Again the presence of alkyl group reduces the acidic property due to its `+I` effects. Hence the order of acidity of the give compounds:
`HC-= overset(sp)(C)H gt CH_(3) - C-= overset(sp)(C)H gt CH_(2) = overset(sp^(2))(C)H_(3) - overset(sp^(3))(C)H_(3)`