1.The major product of the following reaction sequence is:Propiophenone →(i) HCHO, NaOH, Δ→(ii) HCHO, H+\xrightarrow{\text{(i) HCHO, NaOH, }\Delta} \xrightarrow{\text{(ii) HCHO, H}^+}(i) HCHO, NaOH, Δ(ii) HCHO, H+a.A dioxane derivative with a phenyl groupb.A diol with a phenyl ketonec.A hydroxymethyl-substituted ketoned.A bis-hydroxymethyl ketoneLogin to continueOnly logged in users canattempt or see the solution.