The frequency of light emitted for the transition n = 4 to n = 2 of He+ is equal to the transition in H atom corresponding to which of the following

Q. The frequency of light emitted for the transition n = 4 to n = 2 of He+ is equal to the transition in H atom corresponding to which of the following

A. n = 4 to n = 3

B. n = 3 to n = 1

C. n = 2 to n = 1

D. n = 3 to n = 2

Answer: n = 2 to n = 1