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Question

Let A={1,2,4},B={2,4,5},C={2,5}, then (AB)×(BC) is

A
{(1,2),(1,5),(2,5)}
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B
{(1,4)}
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C
{(4,1)}
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D
ϕ
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Solution

The correct option is B {(1,4)}
AB={1}BC={4}(AB)×(BC)={(1,4)}

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