Identify $\mathrm{Z}$ in the following sequence of reactions?

Identify $\mathrm{Z}$ in the following sequence of reactions?
  1. $\mathrm{CH}_{3}-\mathrm{CH}_{2}-\mathrm{CH}_{2}-\mathrm{OH}$
  2. $\left(\mathrm{CH}_{3}\right)_{2} \mathrm{CH}-\mathrm{CH}_{2}-\mathrm{OH}$
  3. $\mathrm{CH}_{3}-\mathrm{CH}=\mathrm{CH}_{2}$

Asked in: MHT CET 2020 (15 Oct Shift 2)

Practice more Alcohols Phenols and Ethers questions on Aicharya