119. tick the correct (1) 4-b={x:xeanxe b} (2) a-b={x:xeauxe b} (3) a-b={x:xganxe b} (4 a-b={x:xeauxeb}

Option (1) is right. A - B or A difference B as it is called, is equal to the intersection between what belongs to A and what does not belong to B.

option- A is correct The difference of set B from set A, denoted by A-B, is the set of all the elements of set A that are not in set B. In mathematical term