Correct option is (a) Prop-2-en-1-al
The structure of Acraldehyde is
\(CH_2 = CH - CH O\)
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.
