`CH_3 CH_2 Cl overset ("NaOH")to X overset ("Ni//H_2") to Y overset("Acetic") underset("anhydride") to Z`
Z in the above sequence is

CH_3CH_2Cloverset(NaCN)rarrXoverset(Ni//H_2)rarrY Yoverset(Acetic)underset(anhydride)rarrZ Z in the above reaction sequence is

CH_(3)CH_(2)Cloverset(NaCN)rarrXoverset(Ni//H_(2))rarrYunderset("anhydride")overset(Acetic)rarrZ Z in the above reaction sequence is .

CH_(3)CH_(2)Cioverset(NaCN)rarrXoverset(Ni//H_(2))rarrYunderset("anhydride")overset(Acetic)rarrZ Z in the above reaction sequence is .

In the following sequence : CH_(3)CH_(2)Cloverset(NaCN)(to) (i) overset(Ni//H_(2))(to) (ii) overset("acetic anhydride")(to) (iii) , Product (iii) is :