Lines a and b are horizontal and parallel to each other. Line a contains points L and M and line b contains points O and N. Line c is diagonal and intersects line a at point X and line b and point Z. It also contains points H and G. Line d is diagonal and intersects line a at point X and line b at point Y. It also contains points J and K. Triangle X Y Z is created by the lines.
Which represents an exterior angle of triangle XYZ?
∠LXZ
∠JXM
∠JXZ
∠HXJ
picture below.