To determine the theorem for a Side - Angle - Side theorem
The Side-Angle-Side theorem of congruency states that, if two sides and the angle formed by these two sides are equal to two sides and the included angle of another triangle, then these triangles are said to be congruent.
Therefore the additional suffice to prove the side-angle-side theorem is
[tex]\begin{gathered} <\text{OQR }\cong
Hence the correct answer is Option D