Dear Student ,
We know that the Balmer series of hydrogen spectrum lies in the visible region.
Wavelength limits of Balmer series is 3646 A0 to 6563 A0
and also paschen series lies in the infrared region.
Wavelength limit=8220 A0to 18751A0
Therefore from the given wavelengths, 824,970,1120,2504 can not belong to the hydrogen spectrum.
Regards