To select the best reagent for every step, the first step involves the reduction of alkyne to alkene.
It should be noted that a reagent is simply a vital part of a chemical reaction. It's a substance that facilitates the reaction.
In this case, the first step is the reduction of alkyne to alkene using H2 and Lindlar's catalyst. The next step will be the bromination of alkene in order to give allyl bromide.
In this case, the reaction of allyl bromide with NaOH will give the desired allyl alcohol.
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