The correct options are
B ∠4 and ∠5
D ∠3 and ∠6
Alternate Interior Angles are created where a transversal crosses two parallel lines. Each pair of these angles are inside the parallel lines, and on opposite sides of the transversal.
Hence, in the given figure,
∠4 and ∠5 and ∠3 and ∠6 are Interior Alternate Angles.