Which is the most suitable reagent for

Question:

Which is the most suitable reagent for the following transformation ?

  1. alkaline $\mathrm{KMnO}_{4}$

  2. $\mathrm{I}_{2} / \mathrm{NaOH}$

  3. Tollen's reagent

  4. $\mathrm{CrO}_{2} / \mathrm{CS}_{2}$

Correct Option: , 2

Solution:

$\mathrm{I}_{2} / \mathrm{NaOH}$

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