Question

From which set of dimensions could a triangle be constructed?

Answer 1

D....just did this question

Answer 2

The longest side of the triangle has to be less than the sum of the two other sides.

A ⇒ 7 + 8 = 15 
B ⇒ 8 + 5 < 14
C ⇒ 6 + 3 < 10
D ⇒ 2 + 6 > 7

The answer is D, because the longest side length (7) is shorter than the two other side lengths (2 and 6).