A wheel of radius `R` rolls without slipping on the horizontal surface with speed `v_(0)`. When the contact point is `P` on the road, a small patch of mud separates from the wheel at its highest point strikes the road at point `Q`. Find distance `PQ`.
A. `vsqrt(r/g)`
B. `2vsqrt(r/g)`
C. `4vsqrt(r/g)`
D. `vsqrt((3r)/g)`