There is a Test Case:

Your Input:
[10, 8, 6]
[9, 7, 5]
2
Expected: [[8,9],[10,9]]

While this Test Case is correct, there is an alternate solution:

Your Input:
[10, 8, 6]
[9, 7, 5]
2
Output: [[10,7],[10,9]]

Both solutions should be correct as:

[10, 7] and [8, 9] add up to 17
[10, 9] adds up to 19

Either this test case should be removed/altered to have only one solution or the question should mention how to prioritize the options.