We are given traingle ABC and Triangle DEF.
Angle <A is congruent to Angle <D
Angle <B is congruent to Angle <E
Angle <C is congruent to Angle <F.
If two pairs of corresponding angles are congruent to each other, then the triangles are similar by Angle-Angle Similarity.
By Angle-Angle similarity postulate triangle ABC and triangle DEF are similar.
Therefore, option C is correct option.
C. Similar - AA.
