Question:X = { a, b }, Y = { b, c }, Z = { b, 3, 4 } হলে,  X `uu` Y `uu` Z 

A 1 
B 3 
C 5 
D 7 

+ Answer
C 

+ Explanation
[ন. প্র. দি. বো. ]

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Zinia Islam

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