You Are Given an E-R Diagram with Two Entities,ORDER and CUSTOMER,as

question 101

Multiple Choice

You are given an E-R diagram with two entities,ORDER and CUSTOMER,as shown above,and are asked to draw the relationship between them.If a given customer can place only one order and a given order can be placed by at most one customer,which of the following should be indicated in the relationship symbol between the two entities?

• A)N:M
• B)1:1
• C)1:N
• D)N:1

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Definitions:

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