Explanation
Upto n = 1 it gives Lyman series
Upto n = 2 it gives Balmer series
Upto n = 3 it gives Paschcn series
Upto n = 4 it gives Brackett series
Upto n = 5 it gives Pfund series
James Chadwick discovered the neutron.
Positron is antiparticle of electron
Both coulomb and nuclear force act inside the nucleus.
Mass of H2 nucleus = mass of proton = 1 amu energy equivalent to 1 amu is 931 MeV so correct option is (b)
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