Match each orbital in List-I with the correct description of its nodes in List-II. 3p | 1. Total nodes 2, of which 1 is radial | | Q. 4d | 2. Total…

The number of radial nodes is $n-l-1$ and the number of angular nodes is $l$, so the total number of nodes is $n-1$. P (3p): $n=3,l=1$: radial $=1$, angular $=1$, total $=2$: entry 1. Q (4d): $n=4,l=2$: radial $=1$, angular $=2$, total $=3$: entry 2. R (4f): $n=4,l=3$: radial $=0$, angular $=3$, total $=3$ with none radial: entry 3. S (5s): $n=5,l=0$: radial $=4$, angular $=0$, total $=4$, all radial: entry 4. Entry 5 (total 3, two radial) belongs to 4p ($n-l-1=2$), which is not in List-I. Correct code: P→1, Q→2, R→3, S→4.