Equal Vectors

Q. Which of the following vector is/are equal to vector AB, where A(0, 0) and B(1, 1).

1. 
   CD where C(0, 0) and D(-1, -1)
2. 
   EF where E(-1, 0) and F(0, 1)
3. 
   GH where G(0, 0) and H(2, 2)
4. 
   IJ where I(0, 0) and J(0, 1)