Which of the following electronic transitions would emit the lowest energy photon?
B- n=2 to n=1
C-n=3 to n=2
D-n=5 to n=2
![Which of the following electronic transitions would emit the lowest energy photon B n2 to n1 Cn3 to n2 Dn5 to n2 class=](https://us-static.z-dn.net/files/d53/2f1548c2aa8353d86ffe9c7f62d0f078.jpg)