In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:
A: If ∆ABC and ∆PQR are congruent triangles, then they are also similar triangles.
R: All congruent triangles are similar but the similar triangles need not be congruent.
Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).