An object may have:
| (a) | varying speed without having a varying velocity. |
| (b) | varying velocity without having varying speed. |
| (c) | non-zero acceleration without having a varying velocity. |
| (d) | non-zero acceleration without having varying speed. |
Choose the correct option from the given ones:
| 1. | (a) and (b) only |
| 2. | (b) and (c) only |
| 3. | (c) and (d) only |
| 4. | (b) and (d) only |