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If A sub B " and " B sub C, " then " ...

If `A sub B " and " B sub C, " then " A in C ` is this statement true ?

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The correct Answer is:
Not true
LetA = {2}, B = {0, 2}, and C ={ 1,{0,2},3}
Here, `A sub B,B in C `
`However ,A in C`
So given statement is false ,
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