`(CH_(3))_(3) C - CHO` does not undergo aldol condensation due to

This does NOT undergo aldol condensation :

CH_(3)-underset(CH_3)underset(|)overset(CH_(3))overset(|)C-CHO does not show aldol condensation because :

(CH_(3))_(3)C CHO does not undergo Cannizzaro's reaction. Why?

Butanal undergoes aldol condensation to give

Assertion: Cinnamaldehyde (Ph - CH = CH - CHO) falls to undergo aldol condensation. Reason : This is due to the fact that cinnamaldehyde does not have acidic alpha - H .

Which of the following does not undergo aldol condensation