Compound shown below is formed by the reaction of:

Step-by-step solution

The given compound is a cyclic acetal, which is formed by the reaction between a carbonyl compound (aldehyde or ketone) and a diol. To identify the reactants, we cleave the C-O bonds at the acetal carbon (the carbon bonded to two oxygen atoms in the ring). The acetal carbon is bonded to a methyl group ( -CH₃ ) and a hydrogen atom. This indicates that the carbonyl compound used is acetaldehyde ( CH₃CHO ). The rest of the molecule comes from the diol. Cleaving the acetal linkages and adding hydrogen back to the oxyge