Explanation:
X = third side
due to the triangle side length rule: sum of any two sides must be greater than the third side
so
4 + 6 > x so x <10
x + 4 > 6 so x > 2
x + 6 > 4 and any value of x will work here
so
2 < x < 10 <=====use this to answer your question as you didn't list the choices in your post