The Balmer series of hydrogen spectrum appears in the

Explanation

Balmer transitions all end on the second energy level, and those energy gaps correspond to visible photons, which is why these are the hydrogen lines seen through a laboratory spectroscope. The Lyman series ends on the ground state and lies in the ultraviolet because its gaps are larger, while Paschen and the higher series fall in the infrared. Identifying the level a series ends on tells you its region immediately.