Question: If set S { A , B , C } is a superkey for the relation R ( A , B , C , D

If set S{A,B,C} is a superkey for the relation R(A,B,C,D,E), then
{A,B} is also a superkey for R
No subset of S is also a superkey for R
{D,E} is also a superkey for R
(D){A,B,C,D} is also a superkey for R
If set S { A , B , C } is a superkey for the

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