C3H6 is most likely to show addition reaction.
The addition reaction is shown by the unsaturated compounds which contain double bonds or triple bonds like alkenes and alkynes.
C3H8 – is a saturated hydrocarbon as it does not contain double bonds or triple bonds.
On the other hand, C3H6 – is an unsaturated hydrocarbon as it contains a double bond. Thus, C3H6 undergoes addition reaction.
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