Answer:
The correct option is 2.
Explanation:
It is given that triangle ABC is similar to triangle PQR.
In triangle ABC, AB=c, BC=a, and AC=b.
In triangle PQR, PQ=r, QR=p, PR=q.
The corresponding sides of similar triangles are proportional.
Since
, therefore their corresponding sides are proportional.


It meas the ratio c:r = a:p = b:q.
Therefore the correct option is 2.