By SN1 reaction allyl chloride changes to allyl alcohol as shownCH2=CH−CH2Cl+H2O⟶SN1CH2=CHCH2OH    I                                           II     Select the correct product II(C1414- an isotope of carbon)

SN1 means unimolecular (1) nucleophilic (N) substitution (S). Rate is independent of molar concentration of H2O but is dependent on molar concentration of CH2=CHCH2−Cl.CH2=CH−CH142CI⇌CH2=CH CH2⊕                                                  14                                         Carbon cation                                           (Intermediate)Carbocation exists as resonance structures. Thus H2O (nucleophile) can attack at C⊕CH2=CH⊕−CH214 +H2O→CH142=CH−CH142OH 14C at original position) CH2⊕−CH=CH214+H2O→CH2=CH−CH2OH(14C) at changed position due to resonance).