The Transition in Atomic Hydrogen That Gives the Longest Wavelength

Multiple Choice

The transition in atomic hydrogen that gives the longest wavelength in the visible spectrum is

A) n = 4 to n = 1.
B) n = 3 to n = 1.
C) n = 2 to n = 1.
D) n = 4 to n = 2.
E) n = 3 to n = 2.