Which angles are vertical?
∠PKO and ∠MKN
∠LKM and ∠MKN
∠PKO and ∠PKL
∠MKN and ∠OKN

Answer:
Step-by-step explanation:
Answer: ∠PKO and ∠MKN
Explanation: Angles that are opposite each other when two lines intersect each other are vertical angles.