![Image](https://s18.postimg.cc/en6vd2t5x/2015-10-16_0900.png)
The graph of the equation xy=k, where k<0, lies in which two of the quadrants shown above?
(A) I and II.
(B) I and III.
(C) II and III.
(D) II and IV.
(E) III and IV.
The OA is D.
Please, can any expert assist me with this PS question? I don't have it clear and I appreciate if any explain it for me. Thanks.