Hey neko it wouldnt let me talk

Which of the following of the following sets of side lengths could not form a triangle?

Which is a true statement about an exterior angle of a triangle a. it is formed by two segments that are not sides of the triangle, b. it forms a linear pair with one of the interior angles of the triangle, c. it is complementary to one of the interior angles of the triangle. d. it is formed by two segments that are sides of the triangle.

Solve this problem! extra ! 3025/5.5 = a/90.75 / = fraction