In hydrogen atomic spectrum, a series limit is found at 12186.3 cm^-1. Then, it belongs to

For limiting line, ${\mathrm{n}}_2=\mathrm{\infty }$
$\overline{\mathrm{v}}={\mathrm{R}}_{\mathrm{H}}\left[\frac{1}{{\mathrm{n}}_1^2}-\frac{1}{{\mathrm{n}}_2^2}\right]$
$\begin{array}{l}12186.3=109678\left[\frac{1}{{\mathrm{n}}_1^2}-\frac{1}{{\mathrm{\infty }}^2}\right]\\ \therefore {\mathrm{n}}_1=3\end{array}$
Since n₁ = 3, it belongs to Paschen series.