In the figure below, lines RS and PQ intersect each other at point O. If PQ isn't perpendicular to RS, which of the following is/are true?
Here ∠POS=∠ROQ - Vertically opposite angles
And, ∠SOQ=∠POR - Vertically opposite angles
∠POS=∠POR - Adjacent angles
∠SOQ=∠ROQ - Adjacent angles