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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 ?
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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
X existence is dependent on Y
C
operationally, if X is deleted, so is Y
D
operationally, if X is deleted, Y remains the same
Answer & Explanation
Option: [B]
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