Question

In the human body, which of the following is/are involved in processing of a foreign antigen?

• A. B-cells
• B. Macrophages
• C. Red blood cells
• D. Platelets

Hint:

Macrophages and B-cells play essential roles in the immune response, with macrophages presenting antigens and B-cells producing antibodies.

Answer 1

The Correct Option is A, B

Step 1: Understanding the immune response.
In the immune system, processing of foreign antigens is an essential part of recognizing and fighting pathogens. B-cells and macrophages are both crucial in this process.

Step 2: Analyzing the options.
- (A) Correct, B-cells are involved in the humoral immune response and help in recognizing and processing antigens to produce antibodies.
- (B) Correct, macrophages are antigen-presenting cells that engulf pathogens and present their antigens to T-cells.
- (C) Incorrect, red blood cells do not participate in the immune response or antigen processing.
- (D) Incorrect, platelets are involved in clotting, not in processing foreign antigens.
Step 3: Conclusion.
The correct answer is (A) B-cells and (B) Macrophages, as both are involved in antigen processing.