Consider that there are 5 attributes present about R.
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Consider that there are 5 attributes present about R. They are PQRST. Fields of R contain only atomic values.
R = {P→Q, R→S, P, T, Q→S, R→P, PR→Q} is a set of functional dependencies.
How many candidate keys does the relation R have? Select the correct answer from the given choices.
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Answer: A. A) 3
Accurate technical and quantitative evaluation based on foundational principles.
Step-by-step Derivation:
Step 1: Formulate problem conditions.
Step 2: Apply logical deduction.
Step 3: Conclude correct option.