Which of the following point lies on the x-axis?

Correct option is B

Concept Used:

A point on the x-axis has the form (x, 0), where the y-coordinate is always zero. This is because the x-axis is the line where all points have a zero value for the y-coordinate.
Solution: 

(2, 3): The y-coordinate is 3, so this point is not on the x-axis.
(2, 0): The y-coordinate is 0, meaning this point is on the x-axis.
(1, 2): The y-coordinate is 2, so this point is not on the x-axis.
(0, 4): The y-coordinate is 4, so this point is not on the x-axis.
Hence, the point (2, 0) lies on the x-axis.