I:Aspergillus niger is used to produce citric acid, which is widely utilized in the food and pharmaceutical industries. (✔ Correct)
II: "Clot buster" refers to agents that help in dissolving blood clots. However, pectinase, produced by certain fungi, is not involved in blood clotting. (❌ Incorrect)
III: Cyclosporin A is an immunosuppressive agent used in organ transplant patients to prevent rejection. (✔ Correct)
IV: Biogas is produced from organic waste, but activated sludge is a waste treatment process that does not directly relate to biogas production. (❌ Incorrect)
