1.
Consider the following reaction:

CH3CHO+CH3CH2CHO→(CH3CH2O)3AlH2O\mathrm{CH_3CHO + CH_3CH_2CHO \xrightarrow{(CH_3CH_2O)_3Al} H_2O}

The expected organic product(s) is/are:

Note: More than one option may be correct.