Diameter of the objective lens of a telescope is 250 cm. For light of wavelength 600 nm, coming from a distant object, the limit of resolution of the telescope is close to:

$1.5 \times 10^{-7} rad$ $2 \times 10^{-7} rad$ $3 \times 10^{-7} rad$ $4.5 \times 10^{-7} rad$

$3 \times 10^{-7} rad$

The correct answer is Option (2) → $3 \times 10^{-7} rad$