Please answer with reason for all why the option is correct and why the other options are incorrect Please answer correct otherwise skip it

A calculated field in the normalisation process requires special treatment. Which of the following is correct?

		If the borrowing duration is fixed in a library, either of the date-borrowed or the due-date can be kept but not both.
		If both DOB (Date of Birth) and Age information are available, we will keep the Age information as it is more useful.
		We can keep either the Starting Time or the Ending Time of a match in a data table regardless of whether the match has a fixed duration or not.
		None of the other answers are correct.