Consider a relational schema R = (A, B, C, D, E, H) on which the following functional dependencies hold: {A B, BC D, E C, D A}. What are the candidate keys of R?

Consider a relational schema R = (A, B, C, D, E, H) on which the follo

1.	Consider a relational schema R = (A, B, C, D, E, H) on which the following functional dependencies hold: {A B, BC D, E C, D A}. What are the candidate keys of R?
A.	AE, BE
B.	AE, BE, DE
C.	AEH, BEH, BCH
D.	AEH, BEH, DEH
Answer» E.

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Consider a relational schema R = (A, B, C, D, E, H) on which the following functional dependencies hold: {A B, BC D, E C, D A}. What are the candidate keys of R?

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