Arrange in ascending order of fc, cut off frequency of the

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Arrange in ascending order of fc, cut off frequency of the waveguides in the following modes:

1. TE₁₀ < TE₂₀ < TE₀₁ < TM₁₁
2. TE₁₀ < TE₀₁ < TE₂₀ < TM₁₁
3. TM₁₁ < TE₀₁ < TE₂₀ < TE₁₀
4. TE₀₁ < TE₁₀ < TE₂₀ < TM₁₁

Correct Option: B

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