The product (A) of the given reaction is: | vedclass

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(C) The reaction involves the electrophilic addition of $Br_2$ to an allene system containing an internal nucleophile (hydroxyl group). $1$. The $Br_2

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(C) The reaction involves the electrophilic addition of $Br_2$ to an allene system containing an internal nucleophile (hydroxyl group). $1$. The $Br_2$ molecule forms a cyclic bromonium ion intermediate with one of the double bonds. $2$. The internal hydroxyl group $(-OH)$ acts as a nucleophile and attacks the electrophilic carbon of the bromonium ion. $3$. This intramolecular nucleophilic attack leads to the formation of a $6$-membered cyclic ether ring. $4$. The final product is a $6$-membered ring containing an oxygen atom,a double bond,and a bromine substituent.

The product $(A)$ of the given reaction is:

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