Card 16 / 59: If getPrimaryKey() (in EJBObject class) is invoked looking first for a session bean, then second for an entity bean, what would be the result?
A) Invoking getPrimaryKey() looking for a session bean will cause throwing an exception
B) Invoking getPrimaryKey() looking for a session bean will return the primary key of the session bean
C) Invoking getPrimaryKey() looking for an entity bean will cause throwing an exception
D) Invoking getPrimaryKey() looking for an entity bean will return the primary key of the bean

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