In general one or more attributes will contibute to the primary  but not necessarily all of them. It is the other way around. Nonkey attributes are determined by key attributes. This is true for any relation in third normal form. This is true for a relation in BCNF. A relation in 3rd normal form might not have this property. A relation in 3rd normal form may also be in 4th normal form. However there are exceptional cases where a relation is in third normal form but NOT in 4th normal form. A given relation is known to be in third normal form. Select the statement which can be inferred from this:

