A many-to-one relationship exists between entity sets r1 and r2. How w – McqOptions

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1.	A many-to-one relationship exists between entity sets r1 and r2. How will it be represented using functional depedencies if Pk(r) denotes the primary key attribute of relation r?
A.	Pk(r1) → Pk(r2)
B.	Pk(r2) → Pk(r1)
C.	Pk(r2) → Pk(r1) and Pk(r1) → Pk(r2)
D.	Pk(r2) → Pk(r1) or Pk(r1) → Pk(r2)
Answer» B. Pk(r2) → Pk(r1)

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