Identify the product 'C' in the following sequence of reactions.

The correct answer is Option (4) → $CH_3-CH_2-OH$.

The given reactant is but-2-ene which reacts with ozone \((O_3)\) to form an ozonide (A) which then reacts with \(Zn /H_2O\) to form two moles of ethanal (B). Ethanal then undergoes reduction with \(LiAlH_4\) to form ethanal (C).