The ionization energy of a H like Bohr's atom is 4 Rydberg.Calculate the wavelength radiated when electron jumps from the first excited state to ground state.

Question

$\begin{array}{1 1}(a)\;203.89A^{\large\circ}&(b)\;303.89A^{\large\circ}\\(c)\;209A^{\large\circ}&(d)\;114A^{\large\circ}\end{array}$