The band gaps of a conductor, semiconductor and insulator are respectively ${E G}_{1}, {E G}_{2}$ and ${E G}_{3}$ . The relationship between them can be given as.

{E G}_{1} = {E G}_{2} = {E G}_{3}

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{E G}_{1} < {E G}_{2} < {E G}_{3}

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{E G}_{1} > {E G}_{2} > {E G}_{3}

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{E G}_{1} < {E G}_{2} > {E G}_{3}

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Solution

The correct option is B ${E G}_{1} < {E G}_{2} < {E G}_{3}$
Band gap of the insulator is largest as it restricts the flow of electrons through it. So, $E_{g_{3}} > E_{g_{2}} > E_{g_{1}}$ .

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