Prohibited Information

Credit applications can not ask you about your gender, race, color, religion or national origin, unless you are for residential use. Even then you are not obliged to respond. The information is to enforce fair housing laws only and not used for test purposes.
They can not be asked your marital status, provided to ensure your spouse will help you use, or legally responsible for the loan. Creditors are also banned by the question on your plans to have kids.