[单选题]
01.13: According to the Bohr theor ta4bo7nic-46.oas qf y oken qm:pvxy,s 2o* ;0bf the hydrogen atom, electrons starting in the 4th energy level and eventually ending in the ground state could produce a total of how many lines in the hydrop m2o*e,q; 0v:nxbyskgen spectra?