Question:P = {1}, Q = {2, 3} এবং R = {(x, y) : x`in` P, y`in`Q এবং 

 y = 2x} R = ? 

A {1, 2} 
B {1, 3} 
C {(1, 2), (1, 3)} 
D {} 

+ Answer
A 

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Irin Moni

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