Answer:
The correct option is Sets A and B only
Step-by-step explanation:
A relation in a set is said to be function, if every first element of an ordered pair in a set is related with unique element of second element.
No,two distinct second element of an ordered pair,has same first element.
For Set A:
Every First element of set A has unique second element. So, it is a function.
For Set B:
Every First element of set B has unique second element and no two distinct Second element of set B,has same first element. So, it is a function.
Thus the correct option is Sets A and B only.