In a circle, PQ and RS are two diameters that are perpendicular to each other. Find the length of the chord PR.

Answer: Option D

Let, PO = RO = 1
PQ = 2
PQ = $$\sqrt{2}\times \sqrt{2}$$
PQ = PR × $$\sqrt{2}$$
PR = $$\frac{\text{PQ}}{\sqrt{2}}$$