Answer:
Option (4)
Explanation:
Since, lines l and m are the parallel lines and line 'n' is intersecting these parallel lines,
Option (1)
∠c ≅ ∠y
True.
[Corresponding interior angles]
Option (2)
∠a ≅ ∠w
True.
[Corresponding interior angles]
Option (3)
∠b ≅ ∠x
True.
[Corresponding interior angles]
Option (4)
∠b ≅ ∠z
False.
[Since, ∠b + ∠Z = 180°, consecutive exterior angles]
Option (5)
∠a ≅ ∠z
True.
[Alternate exterior angles]
Therefore, Option (4) will be the answer.