An astronaut is looking down on earth's surface from a space shuttle at an altitude of \[400\,km.\] Assuming that the astronaut's pupil diameter is \[5\,mm\] and the wavelength of visible light is \[500\,nm.\] The astronaut will be able to resolve linear object of the size of about [AIIMS 2003]

• A.            0.5 m                                       
• B.            \[5\,m\]
• C.            50 m                                        
• D.            500 m