Answer:
Find out the what else would need to be congruent to show that ΔABC ≅ ΔPQR by SSS .
To prove
SSS congurence property
Triangles are congruent if all three sides in one triangle are congruent to the corresponding sides in the other triangle.
As given


Thus to prove ΔABC ≅ ΔPQR are congurent by SSS congurence property.
Thirds sides of both the triangles must be congurents.
i.e

Therefore Option (C) is correct .