155. In Hydrogen atom, electron is present in 6^th energy level, which is/are correct about the Hydrogen spectrum?
i) Total 15 emission lines are observed in spectrum
ii) 4 emission lines belong to Lyman series and 5 emission lines belong to Balmer series
iii) 2 emission lines belong to Brackett series and 3 emission lines belong to Paschen series
iv) One emission line belongs to Humphrey series