Question 7 ..given Rydberg constant....

7. Given Rydverg constant R = 10⁵ cm⁻¹. Supposing if electron jumps from M shell to K shell of H-atom, the frequency of the radiation emitted in cycles would be-
(1) $\frac{8}{9}\times {10}^5$
(2) $\frac{8}{3}\times {10}^{15}$
(3) $\frac{8}{3}\times {10}^{11}$
(4) $\frac{8}{9}\times {10}^{15}$