A doctor is located at X and his hospital is located at Y. There is no straight lane from the doctor’s house to the hospital. So, the doctor first goes to A which is 600 m due east of X, then goes to B which is 450 m due south of A, then to C which is 120 m due west of B and finally reaches the hospital at Y which is 90 m due to north of C. With respect to the hospital the correct direction of the doctors house is