A Superkey is:

A Superkey is:Select one:a.Every superkey is a primary keyb.A superkey is an attribute or a set of attributes that can uniquely identify a tuplec.A superkey is a tuple or a set of tuples that can uniquely identify an attributed.Every superkey is a candidate key

If a proper subset of X is a superkey, then X cannot be a key.Question 4Select one:TrueFalse

Which of the following is known as minimal super key?Primary keyCandidate keyForeign keyNone

What are the uses of super keyword?

______________ is the superset of all keys in a relation.OptionsSuper keyCandidate keySub keyForeign key