The forbidden energy band gaps in conductors,semiconductors,and insulators are $E_{G1}$,$E_{G2}$,and $E_{G3}$ respectively. The relation among them is:
- A$E_{G1} = E_{G2} = E_{G3}$
- B$E_{G1} < E_{G2} < E_{G3}$
- C$E_{G1} > E_{G2} > E_{G3}$
- D$E_{G1} < E_{G2} > E_{G3}$
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