Given:
[tex]\Delta\text{ABC}\cong\Delta\text{STR}[/tex]
It is also shown that
Hence,
Since triangles ABC and STR are congruent, the side opposite to equal angles are also congruent.
Since sides CA and RS are opposite to the 90 degree angle, those sides are congruent.
Therefore, CA≅RS.
[tex]\bar{CA}\cong\bar{RS}[/tex]
Option B is correct.
