At What Redshift Would a Quasar's Emission Line Emitted at 121.6

Multiple Choice

At what redshift would a quasar's emission line emitted at 121.6 nm show up at the "normal" wavelength of 486.1 nm of the Balmer H $\alpha$ line?

A) 1
B) 2
C) 3
D) 5
E) 7