Consider two aldehydes containing `alpha`-hydrogenes,
(I) `CH_(3)CH_(2)CHO`
(II) `H_(2)C=CH-CHO`
The correct statement (s) is/are:
A. both undergo aldol condensation
B. both do no undergo aldol condensation
C. only aldehyde (I) undergoes aldol condensation
D. only aldehyde (II) undergoes aldol condensation