Correct IUPAC name of

is:
Answer & explanation
Correct answer: option 1
The correct answer is option 1. pent-2-enal.
The given structure is

The parent chain has 5 carbon atoms and one of them is an aldehyde group so numbering starts from there. There is a double bond on the 2nd carbon atom. So, the name of the compound will be pent-2-enal