(A) - (III) amiability: "She always treats us with great amiability" - amiability (noun) means friendliness and pleasantness, fitting after "great"
(B) - (IV) heinous: "Food adulteration is a heinous crime" - heinous means utterly wicked/evil, perfectly describing serious crimes
(C) - (I) radiant: "I like her radiant smile" - radiant (adjective) means bright and glowing, commonly paired with smile
(D) - (II) benevolent: "Donation to poor and needy people is a benevolent act" - benevolent means kind and charitable, ideal for describing donations
Hence, Option 4: (A) - (III), (B) - (IV), (C) - (I), (D) - (II) -> Each word matches grammatically (nouns where needed, adjectives where needed) and contextually (positive words for positive contexts, negative for negative) with their respective sentences -> correct