<h3><u>
Answer:</u></h3>
The set of integers which form a Pythagorean triple is:
5,12,13
<h3><u>
Step-by-step explanation:</u></h3>
We are asked to find the set of integers such that they form a Pythagorean triplets.
Three integers a,b,c are said to form a Pythagorean triplets if they satisfy the property:

1)
3,5,6

and

Hence option: 1 is incorrect.
2)
5, 12, 13

and

This means:

Hence, option 2 is correct.
3)
15,9,17

Also,

Hence, option 3 is incorrect.
4)
6,8,12

and:

Hence, option 4 is incorrect.