Consider a hydrogen like atom whose energy in nth exicited state is given by \[{{E}_{n}}=-\frac{13.6{{Z}^{2}}}{{{n}^{2}}}\] when this excited atom makes a transition from excited state to ground state, most energetic photons have energy Emax = 52.224 eV and least energetic photons have energy Emin = 1.224 eV. The atomic number of atom is

• A.            2    
• B.            5
• C.            4    
• D.            None of these