Match each List I with an appropriate pair of characteristics from List II and select the correct answer using the code given below the lists.

	List-I		List-II
P	Lyman series	1	maximum number of spectral line observed $=6$
Q	Balmer series	2	maximum number of spectral line observed $=2$
R	In a sample of $\mathrm{H}$-atom for $5$ upto $2$ transition.	3	$2^{\mathrm{nd}}$ line has wave number $\frac{8\mathrm{R}}{9}$
S	In a single isolated $\mathrm{H}$-atom for $3$ upto $1$ transition	4	$2^{\mathrm{nd}}$ line has wave number $\frac{3\mathrm{R}}{16}$.