UGC-NET | UGC NET CS 2016 Aug – II | Question 19

Consider the following Entity-Relationship (E-R) diagram and three possible relationship sets (I, II and III) for this E-R diagram:

I

II

II

If different symbols stand for different values (e.g., t₁ is definitely not equal to t₂), then which of the above could not be the relationship set for the E-R diagram ?

(A) I only
(B) I and II only
(C) II only
(D) I, II and III

Answer: (A)
Explanation:
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