Find the quantum no 'n' corresponding to the excited state of $He^+$ ion if on transition to the ground state that ion emits two photons in succession with wavelength 108.5 and 30.4nm

Question

$(a)\;2^{nd}\;orbit\qquad(b)\;1^{st}\;orbit\qquad(c)\;3^{rd}\;orbit\qquad(d)\;5^{th}\;orbit$