Answer: (d)
Step-by-step explanation:
Given
[tex]\angle 3=20^{\circ}[/tex]
from the figure, we can write
[tex]\angle 1=\angle 3\quad [\text{vertically opposite angles}][/tex]
[tex]\angle 3=\angle 7\quad [\text{corresponding angles}]\\\angle 5=\angle 7\quad [\text{vertically opposite angles}][/tex]
[tex]\angle 1=\angle 16\quad [\text{corresponding angles}][/tex]
Also,
[tex]\angle 16=\angle 14\quad [\text{vertically opposite angles}][/tex]
[tex]\angle 14=\angle 9\quad [\text{corresponding angles}][/tex]
[tex]\angle 9=\angle 11\quad [\text{vertically opposite angles}][/tex]