Answer:
The two angles are supplementary.
Explanation:
Given ∠ABC measures 124° and ∠MNO measures 56°. we have to find the relation between two angles.
∠ABC=124°
∠MNO=56°
∠ABC+∠MNO=124°+56°=180°
Supplementary angles are either of two angles which add up to give the sum of 180°
As above given two angles gives the sum 180°
⇒ Both angles ∠ABC and ∠MNO are supplementary.
Option B) is correct.