Q20,p2,d14. Identify the minimal key for relational scheme R(A, B, C, D, E) with functional dependencies F = {A →B, B →C, AC →D}

(A) A

(B) AE

(C) BE

 (D) CE

Answer B

Explanation.

A->B

B->C

Then inferred A->C.

A->d

As we now A->c .

E can not be derived by A. hence AE.can derive all  the attributes