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Energy levels $\mathrm{A},\mathrm{B}$ and $\mathrm{C}$ of a certain action corresponding to increasing values of energy i.e. $E_A<E_B<E_C$. If ${\lambda }_1$, ${\lambda }_2$ and ${\lambda }_3$ are wavelength of radiations corresponding to transitions $\mathrm{C}$ to $\mathrm{B},\mathrm{B}$ to $\mathrm{A}$ and $\mathrm{C}$ to $\mathrm{A}$ respectively, which of the following relations is correct?NEET 2005