A = {1,2,3} and B = {a,b,c} . Which of the following is a function from A to B?
{ (1,b), (2,b), (3,a) }
option (a) is not a function as 2 has multiple images and 3 has no image.
option (b) is a function from B to A.
option (c) is not a function as 2 has multiple images.
option (d) is a function from A to B.