Which of the following compounds would yield | vedclass

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(A) Hydroboration-oxidation of alkenes with $BH_3/THF$ follows anti-Markovnikov addition,where the boron atom attaches to the less substituted carbon

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$2$-methylbut-$1$-ene

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(A) Hydroboration-oxidation of alkenes with $BH_3/THF$ follows anti-Markovnikov addition,where the boron atom attaches to the less substituted carbon atom of the double bond.The product shown is tris($2$-methylbutyl)borane,which contains three $2$-methylbutyl groups attached to the boron atom.This indicates that the starting alkene must be $2$-methylbut-$1$-ene $(CH_2=C(CH_3)CH_2CH_3)$.Upon reaction with $BH_3$,the boron atom adds to the terminal $CH_2$ group,resulting in the formation of the trialkylborane derivative shown.

Which of the following compounds would yield the trialkylborane shown below when treated with $BH_3/THF$?

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