A hydrogen atom in ground state absorbs 10.2eV of energy. The orbital angular momentum of the electron is increased by
(a) 1.05 x 10-34J-s
(b) 2.11 x 10-34 J-s
(c) 3-16 x 10 -34J-s
(d) 4.22 x 10 -34J-s.
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