The correct answer is Option 1 - I-D, II-C, III-B, IV-A.

Option 1 matches Malaria with Protozoan, which is correct as Malaria is caused by Plasmodium, a type of Protozoan. Second, it links Poliomyelitis with Virus, which aligns with the fact that Poliomyelitis is caused by the poliovirus, a type of virus. Moreover, it pairs Tuberculosis with Bacteria as Tuberculosis is bacterial in nature, caused by Mycobacterium tuberculosis. Lastly, it correlates Ringworm with Fungi, this is accurate as Ringworm is a skin infection caused by fungi.

Option 2, 3 and 4 does appropriately match the diseases with their causative organisms. In Option 2, Tuberculosis is incorrectly paired with fungi, while in Option 3 and 4, Malaria is wrongly associated with virus and Poliomyelitis is wrongly linked with Protozoan.