Option 1 -> Incorrectly matches "No pain, no gains" with "no single person can do anything" instead of effort-based achievement.
Option 2 -> Incorrectly matches "Birds of a feather flock together" with "a bad experience makes you wary" instead of similar people grouping.
Option 3 -> Incorrectly matches "Once bitten, twice shy" with "without putting in effort" instead of being wary after bad experience.
Option 4 -> Correctly matches: (A) "No pain, no gains" with (III) effort leads to achievement; (B) "One flower makes no garland" with (I) collective effort needed; (C) "Birds of a feather flock together" with (IV) similar people unite; (D) "Once bitten, twice shy" with (II) caution after bad experience.
Hence, Option 4: (A) - (III), (B) - (I), (C) - (IV), (D) - (II) -> Each proverb is accurately paired with its intended meaning: effort brings rewards, teamwork is essential, like-minded people bond, and negative experiences create caution -> correct