In modern microscopes, the quality of image is improved by

The correct answer is Option (1) → Minimising optical aberrations in lens

The image quality of a microscope is limited by optical aberrations of its lenses (spherical and chromatic). Modern microscopes use multicomponent lenses for both the objective and the eyepiece to minimise these aberrations.

NCERT (2026-27):
The Microscope – “… In modern microscopes, multicomponent lenses are used for both the objective and the eyepiece to improve image quality by minimising various optical aberrations (defects) in lenses.”