In an optics experiment, with the position of the object fixed, a student varies the postion of a convex lens and for each position, the screen is adjusted to get a clear image of the object. A graph between the object distance u and the image distance v, from th elens, is plotted using the same scale for the two axes. A straight line passing through the origin and making an angle `45^(@)` with the x-axis meets the experimental curve at P. The coordinated of P will be:
A. `(2f,2f)`
B. `((f)/(2),(f)/(2))`
C. `(f,f)`
D. `(4f,4f)`
