The radius of the first permitted Bohr orbit for the electron, in a hydrogen atom equals 0.51 Å and its ground state energy equals –13.6 eV. if the electron in the hydrogen atom is replaced by muon (${\mathrm{\mu }}^{-}$) [charge same as electron and mass 207 $m_e$], the first Bohr radius and ground state energy will be :

• A

  0.53 × 10^–13m, –3.6 eV

• B

  25.6 × 10^–13m, –2.8 eV

• C

  2.56 × 10^–13m, –2.8 eV

• D

  2.56 × 10^–13m, –13.6 eV