The energy of an electron in the first Bohr orbit of H atom is -13.6 eV . The possible energy value(

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The energy of an electron in the first Bohr orbit of H atom is -13.6 eV . The possible energy value(s) of the excited state(s) for electrons in Bohr orbits of hydrogen is (are)\

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(a,d) : Energy in an orbit of hydrogen atom, $E_{n}$ is given by $$ \begin{aligned} E_{n} & =-\frac{2 \pi^{2} m e^{4} Z^{2}}{n^{2} h^{2}}=-\frac{	ext { Constant } 	imes Z^{2}}{n^{2}} \ & =-\frac{13.6 	imes Z^{2} \mathrm{eV}}{n^{2}} \end{aligned} $$ For $1^{	ext {st }}$ orbit, $n=1$ and $Z=1$,\ Hence $E_{n}=-\frac{13.6 \mathrm{eV}}{1}$\ The possible values of energies are -13.6, $-3.4,-1.5 \mathrm{eV} .$. etc. for $n=1,2,3, \ldots$, etc.\