Answer:
Option A. AB || DC
Explanation:
In the given picture measurement of angle 2 = measurement of angle A
or m∠2 = m∠A (opposite angles)
This only possible only when m∠A = m∠2 = m∠C (Corresponding angles)
If these angles are equal then two lines AB and DC are parallel and two transverse AB and DC are intersecting them.
Therefore option A. AB || DC is the answer.