Immunology

The correct matches are:
Malignant tumors are characterized by metastasis (the spread of cancer cells). Thus, A-III.
MALT (Mucosa-associated lymphoid tissue) is a type of lymphoid tissue. Thus, B-IV.
NACO (National AIDS Control Organisation) is related to AIDS. Thus, C-II.
Alpha-interferons are used to destroy tumors (they have anti-cancer properties). Thus, D-I.
Therefore, the correct option is (1): A-III, B-IV, C-II, D-I.

Statement I: Antibiotics are indeed chemical substances produced by certain microorganisms (like bacteria and fungi) that can inhibit the growth of or kill other microbes. This statement is correct.

Statement II: Antibodies are produced by the immune system (specifically by plasma cells) that recognize and neutralize foreign substances, including microbes. While antibodies don’t directly kill microbes, they mark them for destruction by other immune cells or neutralize them through their toxic effects. Therefore, the statement “Antibodies are chemicals formed in the body that eliminate microbes” is a slightly simplified but generally correct description of their function. Thus, this statement is also correct.