SQL Query Multiple Choice Question with Answer | SQL Quiz Part 2

SQL Query based Multiple Choice Question with Answer | SQL Quiz Part SQL Quiz based on JOIN concepts
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Table and Insert Scripts for Practice
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Create Table X(
Col varchar(5)
)
Create Table Y(
Col varchar(5)
)
Create Table Z(
Col varchar(5)
)
Insert into X Values(null)
Insert into X Values(null)
Insert into X Values('A')
Insert into X Values('A')
Insert into X Values('B')
Insert into X Values('B')
Insert into Y Values('A')
Insert into Y Values('B')
Insert into Y Values('A')
Insert into Y Values('A')
Insert into Y Values('C')
Insert into Y Values(null)
Insert into Z Values('B')
Insert into Z Values('B')
Insert into Z Values('B')
Insert into Z Values('B')
Insert into Z Values(null)
Insert into Z Values(null)
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