A student has focussed on the screen a distant building using a convex lens. If he has selected a blue coloured building as object, select from the following options the one which gives the correct characteristics of the image formed on the screen.

As the student has focussed a distant blue coloured building on the screen using a convex lens, a real inverted and diminished image is formed at the principal focus of the convex lens.
As object is quite far, a diminished image will be formed at the principal focus. The colour of image will be same as colour of the object because no change in colour takes place during refraction.