Tricky circle+triangle geometry

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This was a problem in my coaching study material.

Tangents to circumcircle of ∆ABC at points A,B,C meet the sides BC,CA,AB at points P,Q,R respectively. Prove that P,Q,R are collinear.

I tried joining pq , qr , rq and proving sum of any two is equal to third but only things were getting messy, coordinate geometry also couldnt help. Any help is welcomed and appreciated.