Identify the two statements that contradict each other

Question

III. ∠A and ∠B are obtuse angles.              

III. m∠A = 110                                                   I

III. ∠A and ∠B are supplementary.

Answer 1

I & III because an obtuse angle is greater than 90 degrees and if you add 2 obtuse angles their sum will be greater than 180 degrees which is the definition of supplementary angles.