What is the final product (IV) in the followi | vedclass

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(C) The reaction sequence is as follows:$1.$ $CH_3-CH(OH)-CH_3 + PBr_3 \rightarrow CH_3-CH(Br)-CH_3$ (Isopropyl bromide,$I$)$2.$ $CH_3-CH(Br)-CH_3 + M

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$CH_3-CH(CH_3)-CH_2-CH_2-OH$

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(C) The reaction sequence is as follows:$1.$ $CH_3-CH(OH)-CH_3 + PBr_3 ightarrow CH_3-CH(Br)-CH_3$ (Isopropyl bromide,$I$)$2.$ $CH_3-CH(Br)-CH_3 + Mg/	ext{ether} ightarrow CH_3-CH(MgBr)-CH_3$ (Isopropyl magnesium bromide,$II$)$3.$ $CH_3-CH(MgBr)-CH_3 + 	ext{Ethylene oxide} ightarrow CH_3-CH(CH_3)-CH_2-CH_2-OMgBr$ (Product $III$)$4.$ $CH_3-CH(CH_3)-CH_2-CH_2-OMgBr + H_2O ightarrow CH_3-CH(CH_3)-CH_2-CH_2-OH$ ($3$-Methylbutan$-1-$ol,$IV$).

What is the final product $(IV)$ in the following reaction sequence? $CH_3-CH(OH)-CH_3$ $\xrightarrow{PBr_3} I$ $\xrightarrow{Mg/ether} II$ $\xrightarrow{\text{Ethylene oxide}} III$ $\xrightarrow{H_2O} IV$

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