In the following two figures is plotted against (r) the distance fam nucleus:

Both (A) and (B) are for 1s.
(A) is for 1s & (B) is for 2s .
Both (A) and (B) are for 2s.
(A) is for 2s & (B) is for 1s.
For graph :- specifically for s-orrital graph starts from maximum to minimum are density is more at nucleus that's why graph starts from maximum.
For 1s there is no radial node.
for 2s there is 1 radial node.
Option (2) is the correct answer.