Which of the following statements is true?

Select one:

When representing Pi $3\mathrm{.}1415926...$ value in computer, discretization is needed.

Video uses $24-30$ still frames per second to represent movement. This is an example of discretization

If noise is small enough, degraded analog data can be regenerated

Representing infinite values of $RG$ and $B$ color in the range of $0255$ is an example of sampling

Mercury sphygmomanometer is an example of discrete representation of real world information