Select the incorrect statement about MALT.

Options

A. It constitutes about 20% of lymphoid tissue in human body.
B. It doesn't produces enzymes .
C. it stands for Mucosa Associated Lymphoid Tissue.
D. It is present in respiratory tract .

Answer

To solve the question about MALT (Mucosa Associated Lymphoid Tissue) and identify the incorrect statement, we will analyze each option provided in the question.

### Step-by-Step Solution:

1. **Understanding MALT**:
- MALT stands for Mucosa Associated Lymphoid Tissue. It is a component of the immune system that is associated with mucosal surfaces.

2. **Analyzing the Options**:
- **Option 1**: "It constitutes about 20% of lymphoid tissue in the human body."
- This statement is incorrect. MALT actually constitutes about 50% of the total lymphoid tissue in the human body.

- **Option 2**: "It does not produce its enzyme."
- This statement is correct. MALT does not produce enzymes; it is primarily involved in immune responses.

- **Option 3**: "It stands for mucosa associated lymphoid tissue."
- This statement is correct. MALT is indeed an abbreviation for Mucosa Associated Lymphoid Tissue.

- **Option 4**: "It is present in the respiratory tract."
- This statement is also correct. MALT is present in various mucosal sites, including the respiratory tract.

3. **Identifying the Incorrect Statement**:
- After analyzing all the options, we find that **Option 1** is the incorrect statement because MALT constitutes about 50% of the lymphoid tissue, not 20%.

### Conclusion:
The incorrect statement about MALT is **Option 1**: "It constitutes about 20% of lymphoid tissue in the human body."

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