Which statements about Python functions and functions are true?

Choice $1$ of $4$: Arguments with default values can be omitted when calling functions.

Choice $2$ of $4$: If there is a method of the form obj.method$($argument$),$ it is valid Python to call it using method$($obj$,$ argument$).$

Choice $3$ of $4$: Arguments must always be called in positional order.

Choice $4$ of $4$: The help documentation $("$doc strings"$)$ will display the argument names.