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If A=[(2,-1,3),( -4,5 ,1)] and B=[(2 ,3...

If `A=[(2,-1,3),( -4,5 ,1)]` and `B=[(2 ,3 ),( 4,-2),( 1 ,5)]` , then only `A B` is defined (b) only `B A` is defined (c) `A B` and `B A` both are defined (d) `A B` and `B A` both are not defined

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