Postulates of Bohr model and derivation of energy and radiusEasy

Hydrogen Atom Orbital Energy Levels

For hydrogen atom, the orbital/s with lowest energy is/are :
(A) 4s (B) 3p_x(C) $3{d_{{x^2} - {y^2}}}$ (D) $3{d_{{z^2}}}$ (E) $4{p_z}$
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