The correct option is C Non-uniform motion
During first hour, speed = 60 km/hr
During second hour, speed 70 km/hr
During third hour, speed = 20 km/hr
So, the car travels different distances in equal time intervals. This is an example of non-uniform motion.
As it is not mentioned whether the car was in a to and fro motion, we can't say with surety whether the motion was oscillatory or not.