For the right triangle:
the hypotenuse is the longest side
And the square of the hypotenuse = the sum of the squares of the other sides
so, let check the given options:
A) 2, 3, 13
13^2 = 169
And 2^2 + 3^2 = 13
so, 2, 3, 13 are not sides of a right triangle
B) 4. 6. 10
4^2 + 6^2 = 52
10^2 = 100
So, 4, 6, 10 are not sides of the right triangle
C) 9. 12. 18
9^2 + 12^2 = 225
18^2 = 324
So, 9, 12 , 18 are not sides of the right triangle
D) 15. 36. 39
15^2 + 36^2 = 225 + 1296 = 1521
39^2 = 1521
So, 15^2 + 36^2 = 39^2
So, 15, 36, 39 are set of side lengths of a right triangle