Relation R(A, B, C) has FDs A → B and B → C. The candidate key of R is:
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Correct answer: (B) A
Explanation
A+ = {A, B, C}, so A is the key.
From DSSSB TGT Computer Science Full Mock Test 1
This is question 157 of DSSSB TGT Computer Science Full Mock Test 1. See all questions of this paper with answers, or attempt the paper as a timed online test to get your score and all-India rank.