Alkenes convert into alcohols by:

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(D) Alkenes can be converted into alcohols or diols through various hydration processes.$1$. Alkaline $KMnO_{4}$ (Baeyer's reagent) causes syn-hydroxy

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Both $(b)$ and $(c)$

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(D) Alkenes can be converted into alcohols or diols through various hydration processes.$1$. Alkaline $KMnO_{4}$ (Baeyer's reagent) causes syn-hydroxylation of alkenes to form vicinal diols (glycols): $CH_{2}=CH_{2} + H_{2}O + [O] \xrightarrow{	ext{alk. } KMnO_{4}} CH_{2}(OH)-CH_{2}(OH)$.$2$. Hydration of alkenes using conc. $H_{2}SO_{4}$ followed by hydrolysis with water vapours yields alcohols: $CH_{2}=CH_{2} + H_{2}O \xrightarrow{	ext{conc. } H_{2}SO_{4}} CH_{3}-CH_{2}-OH$.Since both processes result in the formation of hydroxyl-containing compounds,the correct answer is $(d)$.

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