The answer is the option A, which is: A. Congruent-ASA.
The explanation for this exercise is shown below:
1. The Angle-Side-Angle Theorem (ASA) states that when you have two triangles and you know two angles of one of them and these angles are equal to the corresponding angles of the other triangle and the included sides of the triangles are also equal, then the triangles are congruent.
2. As you can see in the figure attached above, the angle ∠P is congruent to the angle ∠S and the angle ∠Q are congruent to the angle ∠T ant sides PQ and ST are equal. Therefore, the correct answer is the option mentioned before.