A student walks 120m due east and then 50m due west in 3min. Which one of the following statements is correct?
(a) Distance travelled is 70m and displacement is 170m east.
(b) Distance travelled is 170m and displacement is 170m east.
(c) Distance travelled is 170m and displacement is 70m west.
(d) Distance travelled is 170m and displacement is 70m east.