UGC NET CSE | June 2007 | Part 2 | Question: 19

Question

A Relation $R=${$A,B,C,D,E,F$} is given with following set of functional dependencies:

$F=${$A\rightarrow B, AD\rightarrow C,B\rightarrow F,A\rightarrow E$}. Which of the following is Candidate Key?

• A. $A$
• B. $AC$
• C. $AD$
• D. None of these

Answer 1

Given Relation is R = ABCDEF

Take options

1. A = ABFE
2. AC = ABCFE
3. AD = ABCDEF​​​​​​

Hence answer would be Option c 

AD will be the candidate keys.