Lyman series
Paschen series
Balmer series
Brackett series
The correct option is B Lyman series. Lyman series corresponds to the highest energy or lowest wavelength transition n→1 transition; where, n≥2. Energy of transition = 13.6eV × (1/nf² - 1/ni²). For any given integer value of ni, the energy of transition is greatest for nf=1