______ is the only country with single coloured flag?
C
Correct answer
Explanation
Libya historically had a single-color green flag from 1977 to 2011, making it unique among sovereign nations. Peru's flag has red and white stripes. 'Naru' is likely a typo for 'Nauru', which has a blue flag with a star. 'Morraco' is a typo for 'Morocco', which has a red flag with a green star (the green pentagram is a key design element, making it not truly single-color). Note: Libya's current flag (post-2011) is the tricolor red-black-green with crescent and star.