Which of the following statement(s) is(are) correct about the spectrum of hydrogen atom? (A) The ratio of the longest wavelength to the shortest wavelength in Balmer series is 9/5 (B) There is an overlap between the wavelength ranges of Balmer and Paschen series 1 (C) The wavelength of Lyman series are given by 1+- +20, where 20 20, where is the shortest wavelength of m Lyman series and m is an integer (D) The wavelength ranges of Lyman and Balmer series do not overlap