One pair of alternate exterior angle in the diagram given above is: B. ∠8 and ∠6.
What is a pair of alternate exterior angles?
In a diagram, a pair of alternate exterior angles is formed by two angles that are located on the exterior sides of a pair of parallel lines and on opposite sides of the transversal.
In the diagram given, angles 8 and 6 are exterior angles that lie on opposite sides of the transversal, which makes them alternate exterior angles.
Therefore, a pair of alternate exterior angle in the diagram is: Option B. ∠8 and ∠6.