Class 12 NEET Physics Optics Questions Part 2

With larger aperture of objective lens, the light gathering power in telescope is high.
Also, the resolving power or the ability to observe two objects distinctly also depends on the diameter of the objective. Thus objective of large diameter is preferred.
Also, with large diameters fainter objects can be observed. Hence it also contributes to the better quality and visibility of images.
Hence, all options are correct.