JEE Main 2019 Physics question

The value of numerical aperture of the objective lens of a microscope is 1.25. If light of wavelength 5000 Å is used, the minimum separation between two points, to be seen as distinct, will be:

• (A)0.12 μm
• (B)0.38 μm
• (C)0.24 μmCorrect
• (D)0.48 μm