Horizontal and parallel lines M Q and U R are intersected by 2 diagonal lines N S and P T to form triangle E G F. Line N S intersects line M Q at point E and intersects line U R at point F. Line P T intersects line M Q at point E and intersects line U R at point G.
Which represents an exterior angle of triangle EGF?

∠MEG
∠NEG
∠PEQ
∠RFS