Read the following passage and solve the questions based on it.
The following questions are based on the diagram given below, showing four persons—
A, B, C and D stationed at the four corners of a square piece of plot as shown:
E - East, S - South, W - West and N - North
From the positions in the original figure, C and A move diagonally to the opposite corners and then one side each clockwise and anti-clockwise respectively. B and D move two sides each clockwise and anti-clockwise respectively. Who is now at the north-west corner?