Correct option is (b) At F, point size, real and inverted
To explain I would say: When the object is at infinity, the image will form at F. It will be of point size, real and inverted. Whereas, if the object is at 2F, the image will form at 2F and the image will be real, inverted and of the same size. Moreover, if the object is beyond 2F, the image will form, in between F and 2F, it will be real, inverted and diminished. While, if the object is in between F and 2F, the image will form beyond 2F, it will be real, inverted and magnified.