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Which of the following is NOT a super key in a relational schema with attributes V W, X, Y, Z and primary key V Y?

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Which of the following is NOT a super key in a relational schema with attributes V W, X, Y, Z and primary key V Y?

(A) V XYZ

(B) V WXZ

(C) V W XY

(D) V W XY Z

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Correct option is (B) V WXZ

Any superset of VY is a super key.

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