Teaching UGC NET Mock Test Series 2025 (Paper 1 & 2) DBMS Query Language Relational Model

Let R (A, B, C, D, E, F) be a relational schema with following functional dependencies:

C → F, E → A, EC → D, A → B. Which of the following is a key for R? 

1
CD 
2
EC
3
AE
4
AC
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