Write resonance structures of `CH_(2)=CH–CHO`. Indicate relative stability of the contributing structures.

Explanation

Stability: `I > II > III`
[I: Most stable, more number of covalent bonds, each carbon and oxygen atom has an octet and no separation of opposite charge II: negative charge on more electronegative atom and positive charge on more electropositive atom, III: does not contribute as oxygen has positive charge and carbon has negative charge, hence least stable].