Given the following relation R and the set of functional dependencies S that hold on R, which of the following options shows the valid candidate keys for R. R(A, B, C, D, E, F) S: {DF → C, BC → F, E → A, ABC → E}
A. ABC, DEF
B. ABD, BDE
C. ABCD, BDEF
D. DEF, ACD, BCF
Answer:C
Given the following relation R and the set of functional dependencies S that hold on R, which of the following options shows the valid candidate keys for R. R(A, B, C, D, E, F) S: {DF → C, BC → F, E → A, ABC → E}
A. ABC, DEF B. ABD, BDE C. ABCD, BDEF D. DEF, ACD, BCF