Which Set of Ordered Pairs Represents a Function from a to B

Which set of ordered pairs represents a function from A to B
A = {3,2,4,1} and B = {-4,-5,3,2,4}

A) {(3,-4) , (2,-5) , (4,-4) , (3,-5) }
B) {(3,-4) , (4,4) , (2,-5) , (1,3) , (2,2) }
C) {(3,4) , (1,3) , (2,2) }
D) {(3,2) , (2,-4) , (4,3) , (1,4) }
E) {(3,-4) , (2,2) , (1,3) }