Choose the incorrect option

Options

A. (1) response of antibodies is also called humoral immune response
B. (2) Colostrum provide passive immunity
C. (3) B lymphocytes produces an army of protein in response to pathogens in our blood to fight with them
D. (4) spleen, tonsils and payers patches of small intestine and appendix are primary lymphoid organs

Answer

To solve the question "Choose the incorrect option," we will analyze each provided statement regarding the immune system and lymphoid organs.

### Step-by-Step Solution:

1. **Analyze the First Option:**
- The first option states that "the response of antibodies is called humoral immune response."
- This statement is **correct**. The humoral immune response involves the production of antibodies by B-cells in response to antigens.

**Hint:** Remember that humoral immunity is primarily mediated by antibodies produced by B-cells.

2. **Analyze the Second Option:**
- The second option states that "cholesterol provides passive immunity."
- This statement is **incorrect**. The correct term should be "colostrum," which is the first milk produced by mammals and contains antibodies that provide passive immunity to newborns.

**Hint:** Focus on the difference between cholesterol (a type of fat) and colostrum (the first milk rich in antibodies).

3. **Analyze the Third Option:**
- The third option states that "B lymphocytes produce an army of protein in response to pathogens in our blood to fight with them."
- This statement is **correct**. B lymphocytes produce antibodies (proteins) in response to pathogens.

**Hint:** B lymphocytes are crucial for the adaptive immune response and produce antibodies to neutralize pathogens.

4. **Analyze the Fourth Option:**
- The fourth option states that "spleen, tonsils, and Peyer's patches of a small intestine and appendix are primary lymphoid organs."
- This statement is **incorrect**. These organs are classified as secondary lymphoid organs. Primary lymphoid organs include the bone marrow and thymus.

**Hint:** Remember the distinction between primary lymphoid organs (where lymphocytes are produced and mature) and secondary lymphoid organs (where immune responses are initiated).

### Conclusion:
The incorrect option is the second one regarding cholesterol providing passive immunity, and the fourth option about the classification of lymphoid organs.

### Final Answer:
- The incorrect option is: **"Cholesterol provides passive immunity."**