Question 1 of 100

In the figure, AB, CD, EF and GH are straight line and EF is parallel to GH. Which of the following statements is correct?

A
$\angle$y + $\angle$z = $\angle$x + $\angle$w
B
$\angle$y + $\angle$x = $\angle$z + $\angle$w
C
$\angle$y + $\angle$x = 180$^\circ$
D
$\angle$z + $\angle$w = 180$^\circ$
E
None of the above