To solve this problem, we need to match the items in List-I with their corresponding descriptions in List-II. Let's analyze each item:$\newline \bullet$(a) Glycogen:$\newline$ - Glycogen is a polysaccharide that serves as a form of energy storage in animals and fungi.$\newline$ - It is primarily stored in the liver and muscle tissues.$\newline$ - Therefore, it matches with (iv) Storage product.$\newline \bullet$(b) Globulin:$\newline$ - Globulins are a group of proteins in the blood plasma.$\newline$ - Some globulins function as antibodies, which are crucial for immune response.$\newline$ - Therefore, it matches with (iii) Antibody.$\newline \bullet$(c) Steroids:$\newline$ - Steroids are a class of lipids that include hormones such as testosterone and estrogen.$\newline$ - They play various roles in the body, including acting as hormones.$\newline$ - Therefore, it matches with (i) Hormone.$\newline \bullet$(d) Thrombin:$\newline$ - Thrombin is an enzyme that plays a role in the blood clotting process.$\newline$ - It acts as a biocatalyst in converting fibrinogen to fibrin during clot formation.$\newline$ - Therefore, it matches with (ii) Biocatalyst.$\newline$Now, let's match the items from List-I with List-II:$\newline (a) \rightarrow (iv), (b) \rightarrow (iii), (c) \rightarrow (i), (d) \rightarrow (ii) \newline$This corresponds to Option 4.