I have problem in set theory of mathematics of class 12 in which i feel confusion in chapter relations, functi?

chapter from set theory is what is relation for example if A={1,2} and B={2,3} then relation is A*B which is also known as cartesian product and thus A*B={ (1,2),(1,3),(2,2),(2,3)} Is this a write answer or wrong but in whole I am confused.
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