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In an E-R, Y is the dominant entity and X is a subordinate entity. Then which of the following is incorrect :

  • A.Operationally, if Y is deleted, so is X
  • B.existence is dependent on Y.
  • C.Operationally, if X is deleted, so is Y.
  • D.Operationally, if X is deleted, & remains the same.

Answer: C

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