Given x-t graph represents the motion of an object. Match the Column I (parts of graph) with Column II (representation) and select the correct option from the codes given below.
| Column I | Column II |
| A. Part OA of graph | p. Positive velocity |
| B. Part AB of graph | q. Object at rest |
| C. Part BC of graph | r. Negative velocity |
| D. Point A in the graph | s. Change in direction of motion |
Options:
(a) A-p B-q C-r D-s
(b) A-p B-r C-q D-s
(c) A-q B-p C-r D-s
(d) A-s B-r C-q D-p