The following diagram indicates the energy levels of a certain atom when the system moves from 2E level to E, a photon of wavelength \[\lambda \] is emitted. The wavelength of photon produced during its transition from \[\frac{4E}{3}\] level to E is [CPMT 1989]

• A.            \[\lambda /3\]         
• B.            \[3\lambda /4\]
• C.            \[4\lambda /3\]       
• D.            \[3\lambda \]