Answer:
[tex]\huge\boxed{\sf Option\ B.}[/tex]
Step-by-step explanation:
The condition of being a function is that the domain (values of y) should not be repeated. However, The set in option B denies that condition. Hence Option B is only a relation and not a function.
[tex]\rule[225]{225}{2}[/tex]
Hope this helped!
~AH1807
