Identify the combination of compounds that undergo aldol condensation followed by dehydration to produce but-2-enal.

Identify the combination of compounds that undergo aldol condensation followed by dehydration to produce 4-methylpent-3-en-2one

Acetone undergoing Aldol condensation followed by dehydration gives

The carbonyl compound that does not undergo aldol condensation is

This does NOT undergo aldol condensation :

Which of the following compounds do not undergo aldol condensation?