Match List-I with List -II

Choose the correct answer from the options given below:

(A)-(III), (B)-(IV), (C)-(I), (D)-(II)

The correct answer is Option (2)- (A)-(III), (B)-(IV), (C)-(I), (D)-(II)

Here's an explanation of the matches:

(A) Lymphoid Organ - (III) Bone marrow and Thymus: Lymphoid organs, such as the bone marrow and thymus, are critical components of the immune system. These organs play a central role in the production and maturation of immune cells, including lymphocytes (such as T cells and B cells). The bone marrow is responsible for the production of various blood cells, including B cells, while the thymus is involved in the maturation of T cells. Together, these organs contribute to the body's defense against infections and diseases.

(B) Cancer - (IV) Carcinogens: Cancer is a group of diseases characterized by uncontrolled cell growth and division. Carcinogens are substances or agents that can increase the risk of developing cancer by causing genetic mutations or other cellular changes that lead to abnormal cell growth. Exposure to carcinogens, such as tobacco smoke or certain chemicals, is a known risk factor for cancer development.

(C) HIV - (I) ELISA: ELISA (Enzyme-Linked Immunosorbent Assay) is a diagnostic test used to detect the presence of specific antibodies or antigens in a person's blood or serum. In the case of HIV (Human Immunodeficiency Virus) testing, ELISA is commonly used to detect antibodies produced by the immune system in response to HIV infection. If antibodies against HIV are detected in the blood, it indicates a positive result for HIV infection.

(D) Typhoid - (II) Widal Test: The Widal Test is a diagnostic test used for the detection of antibodies against Salmonella typhi, the bacterium responsible for causing typhoid fever. When a person is infected with S. typhi, their immune system produces specific antibodies against the bacterium. The Widal Test measures the presence and levels of these antibodies in the patient's blood, helping to diagnose typhoid fever.