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A and $\mathrm{B}$ will have different intensities while $\mathrm{B}$ and $\mathrm{C}$ will have different frequencies

$\mathrm{B}$ and $\mathrm{C}$ will have different intensities while $\mathrm{A}$ and $\mathrm{C}$ will have different frequencies

$\mathrm{A}$ and $\mathrm{B}$ will have different intensities while $A$ and $C$ will have equal frequencies

A and B will have equal intensities while B and $\mathrm{C}$ will have different frequencies