The correct option is A (a) - (iii), (b) - (i), (c) - (ii)
Motion of an elevator is a linear motion as it travels in a straight line.
The motion of the pendulum of a clock represents oscillatory motion as the pendulum swings to and fro continuosly.
You might have seen a merry-go-round in amusement parks. When they are in motion, each part of it moves in a circular path with a fixed radius. Hence, the motion of a merry-go-round is an example of rotational motion.