Concept:Each process in Column-I has a unique scientific description in Column-II. Match them correctly based on definitions.
Explanation:Pasteurisation involves heating milk to a high temperature and then cooling it rapidly to kill bacteria – this matches description (ii).
Fermentation is the process where yeast converts sugar into alcohol – this matches description (iii).
Vaccination means introducing a weakened or inactive germ into the body to build immunity – this matches description (iv).
Preservative refers to adding substances to food to prevent spoilage – this matches description (i).
Thus the correct pairing is (A)-(ii), (B)-(iii), (C)-(iv), (D)-(i).
Answer:Option B: (A) - (ii), (B) - (iii), (C) - (iv), (D) - (i)