Which of the following reactions yields propan-2-ol?

Which of the following reactions yields propan-2-ol?
  1. $\mathrm{CH}_{3}-\mathrm{CO}-\mathrm{CH}_{3} \frac{\mathrm{CH}_{3} \mathrm{Mg} \mathrm{I} / \text { ether }}{\mathrm{H}_{3} \mathrm{O}^{+}}$
  2. $\mathrm{CH}_{3}-\mathrm{CH}=\mathrm{CH}_{2} \frac{\left(\text { i) } \mathrm{B}_{2} \mathrm{H}_{6}\right.}{\text { (ii) } \mathrm{H}_{2} \mathrm{O}_{2}}$
  3. $\mathrm{CH}_{3}-\mathrm{CH}=\mathrm{CH}_{2} \frac{\text { (i) cold.conc } \mathrm{H}_{2} \mathrm{SO}_{4}}{\text { (ii) } \mathrm{H}_{2} \mathrm{O}}$
  4. $\mathrm{H}-\mathrm{CH} 0 \frac{\mathrm{c}_{2} \mathrm{H}_{5} \mathrm{Mg} \mathrm{Br} / \mathrm{ether}}{\mathrm{H}_{3} \mathrm{O}^{+}}$

Solution

1) 2) 3) 4)

Asked in: MHT CET 2020 (20 Oct Shift 1)

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