The transition of electron that gives rise to the formation of the second spectral line of the Balmer series in the spectrum of hydrogen atom corresponds to : (A) $n_f = 2$ and $n_i = 3$ (B) $n_f = 3$ and $n_i = 4$ (C) $n_f = 2$ and $n_i = 4$ (D) $n_f = 2$ and $n_i = \infty$