The IUPAC name of acraldehyde is

Prop-2-en-1-al

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Propenyl aldehyde

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But-2-en-1-al

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Propenal

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Solution

The correct option is A Prop-2-en-1-al
The structure of Acraldehyde is
$C H_{2} = C H - C H O$
As the parent carbon chain consists of three carbon , word root will be prop. The functional group is aldehyde here and the suffix used for aldehyde is -al.

IUPAC name of Acryaldehyde is $Prop-2-en-1-al .$

Hence, option (a) is correct.

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