Question

a relation in a set A is a sunset of ​

Answer 1

$\huge {\underline {\underline {\sf {❧ \: Answer}}}}$

a set A is a subset of a set B if all elements of A are also elements of B; B is then a superset of A. It is possible for A and B to be equal; if they are unequal, then A is a proper subset of B. The relationship of one set being a subset of another is called inclusion (or sometimes containment).