M

Mr. Dubey • 52.30K Points
Coach 

Q. What is a foreign key?

(A) A foreign key is a primary key of a relation which is an attribute in another relation
(B) A foreign key is a superkey of a relation which is an attribute in more than one other relations
(C) A foreign key is an attribute of a relation that is a primary key of another relation
(D) A foreign key is the primary key of a relation that does not occur anywhere else in the schema
Correct : Option (C)

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