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UGC NET CSE | June 2023 | Part 2: 19
Let $\text{R (A,B,C,D,E,F)}$ be a relational schema with following functional dependencies: $\mathrm{C} \rightarrow \mathrm{F}, \mathrm{E} \rightarrow \mathrm{A}, \mathrm{EC} \rightarrow \mathrm{D}, \mathrm{A} \rightarrow \mathrm{B}$. Which of the following is a key for $\mathrm{R}$ ? $\text{CD}$ $\text{EC}$ $\mathrm{AE}$ $\mathrm{AC}$
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