Which of the following is not a true statement?

Question $4$ options:

Logical operators can be used in evaluating expressions containing string$-$based conditions.

functions are easier to document in a test plan

A test for equality is never used in evaluating expressions containing string$-$based conditions.

Logical operators $($and$,$ or$,$ not$)$ can be used to create expressions for evaluating strings.

none of the above