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