Polarization of electrons in acrolein may be written as:

Options

A. `overset(delta+)CH_(2)=CH-CH=overset(delta-)O`
B. `overset(delta-)CH_(2)=overset(delta+)CH-CH=O`
C. `overset(delta-)CH_(2)=CH-CH=overset(delta+)O`
D. `overset(delta-)CH_(2)=CH-overset(delta+)CH=O`

Answer

A

Explanation

`-CHO` group exerts `-R` effect, i.e., it withdraws electron density from the double bond or from a conjugated system: