In the following square represents Doctors, triangle represents Artists, circle represents Weight-lifters and rectangle represents Russians. Which set of letters represents Russians who are not Doctors?
Two ladies P and Q start on their scooters from the same place. P rides 8 km North, then turns West and rides 6 km, then turns to her right and rides 4 km.Q rides 10 km West, then turns to her right and rides 12 km. Where is Q with respect to P now?