Which function returns a valid value without any arguments

Out of the options given below, Today and Now functions returns a valid value without any argument.

Explanation:

The options are:

TODAY The today function returns today date, and every day refreshes itself with that day date. It does not require any argument.

SQRT The SQRT function returns the square root of the passed argument.

COUNT The count counts the total number of the argument provided. Like Count (Employees), it will count in a sheet the total number of employees.

ROUND The Round function rounds the decimal number correct to the given number of decimal places.

NOW Now takes no argument, and returns the current date and time of the system.

And hence, the above answer.