Option 1 -> Incorrectly matches "A damp squib" with ordinary members and "Above board" with complete failure, which are wrong interpretations.
Option 2 -> Correctly matches all idioms: "A damp squib" (complete failure), "Above board" (honest and legal), "Rank and file" (ordinary members), "Weal and woe" (joys and sorrows).
Option 3 -> Incorrectly matches "A damp squib" with joys/sorrows and "Weal and woe" with complete failure, reversing their actual meanings.
Option 4 -> Incorrectly matches "A damp squib" with honest/legal and "Above board" with complete failure, which contradicts their true meanings.
Hence, Option 2: (A) - (III), (B) - (IV), (C) - (i), (D) - (II) -> "A damp squib" refers to something that fails to meet expectations (like a wet firecracker that won't ignite), "above board" means transparent and honest dealings, "rank and file" represents ordinary members rather than leadership, and "weal and woe" encompasses both good times and bad times in life -> correct