Option 1 -> Incorrectly matches substitution effect dominance with complementary goods and other mismatches.
Option 2 -> (A) Normal goods have substitution effect stronger than income effect; (B) Giffen goods have income effect stronger than substitution effect; (C) Inferior goods have demand moving opposite to income; (D) Complementary goods are consumed together.
Option 3 -> Incorrectly matches substitution effect dominance with inferior goods and other incorrect pairings.
Option 4 -> Mismatches by pairing income-demand opposite movement with normal goods.
Hence, Option 2: (A) - (III), (B) - (IV), (C) - (I), (D) - (II) -> For normal goods, the substitution effect dominates because consumers respond more to relative price changes. Giffen goods (strongly inferior) show income effect dominating, causing upward-sloping demand curves. Inferior goods have negative income elasticity (demand falls as income rises). Complementary goods are consumed jointly (like coffee and sugar). -> correct