Answer: C.

Explanation:
- AAS theorem says that if two angles and a non-included side of a triangle are congruent to two angles and a non-included side of other triangle then the triangles are congruent.
 
In the given picture , we have ΔABC and ΔXYZ
Given : 


To show both the triangles are congruent by AAS theorem , we need one more angle such that the given sides must remains non-included.
Thus, 
 must be congruent to 
 to show ΔABC ≅ ΔXYZ by AAS.
[If we take 
, then the triangles are congruent by ASA]