If attribute A determines both attributes B and C, then it is also true that:
A. A → B.
B. B → A.
C. C → A.
D. (B,C) → A.
Answer: Option A
Solution (By Examveda Team)
Option1: A ? B.This option states that attribute A determines attribute B. In the given scenario where attribute A determines both attributes B and C, this statement is true.
Option2: B ? A.
This option states that attribute B determines attribute A. However, in the given scenario where attribute A determines both attributes B and C, this statement is not necessarily true.
Option3: C ? A.
This option states that attribute C determines attribute A. In the given scenario where attribute A determines both attributes B and C, this statement is not necessarily true.
Option4: (B,C) ? A.
This option states that attributes B and C together determine attribute A. In the given scenario where attribute A determines both attributes B and C, this statement is not necessarily true.
Therefore, the correct option is Option1: A ? B.
This Question Belongs to Database >> The Relational Model And Normalization
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