The energy levels of an atom are shown below. When an electron makes a transition from an energy level of $2E$ to an energy level of $E$,the wavelength of the emitted electromagnetic radiation is $\lambda$. What is the wavelength of the emitted photon when the electron makes a transition from an energy level of $4E/3$ to an energy level of $E$?

• A
  $\frac{\lambda}{3}$
• B
  $\frac{3\lambda}{4}$
• C
  $\frac{4\lambda}{3}$
• D
  $3\lambda$