Question
| Column$-1$ | Column$-2$ |
| $1.$ Clicking | $a.$ To press the left mouse button twice quickly |
| $2.$ Left-click | $b.$ To press the left mouse button and move the mouse while keeping it pressed. |
| $3.$ Dragging | $c.$ Pressing and releasing of the mouse button. |
| $4.$ Double-click | $d.$ To press and release the left button of the mouse. |
