JEE Main 2020 Physics question

The energy required to ionize a hydrogen like ion in its ground state is 9 Rydbergs. What is the wavelength of the radiation emitted when the electron in this ion jumps from the second excited state to the ground state ?

• (A)11.4 nmCorrect
• (B)24.2 nm
• (C)8.6 nm
• (D)35.8 nm