Let A = {1,2,3} and B= {2,3,4}, then which of the following relations is a function from A to B

• A

  {(1,2).(2, 3), (3, 4), (2, 2)}

• B

  {(1, 2), (2, 3), (1, 3)}

• C

  {(1,3), (2,3), (3, 3)}

• D

  {(1, 1), (2, 3), (3, 4)}