Select the incorrect statement.

Options

A. (a) Lipases and nucleases are not present in pancreatic juice.
B. (b) Goblet cells secrete mucus.
C. (c) Brunner's glands are sub-mucosal glands.
D. (d) Carboxypeptidase catalyzes conversion of proteins, peptones and proteoses to dipeptides.

Explanation

To solve the question of selecting the incorrect statement, we will analyze each of the four statements provided.

### Step-by-Step Solution:

1. **Analyze Statement A**:
- Statement A claims that "Lipases and Nucleases are not present in pancreatic juice."
- This statement is **incorrect** because pancreatic juice does contain both lipases and nucleases. Lipases help in breaking down fats into fatty acids and glycerol, while nucleases break down nucleic acids (DNA and RNA) into smaller nucleotide units.

2. **Analyze Statement B**:
- Statement B states that "Goblet cells secrete mucus."
- This statement is **correct**. Goblet cells are specialized epithelial cells that produce and secrete mucus, which plays a crucial role in protecting and lubricating the intestinal lining.

3. **Analyze Statement C**:
- Statement C mentions that "Brunner's glands are submucosal glands."
- This statement is also **correct**. Brunner's glands are located in the submucosal layer of the duodenum and are responsible for secreting an alkaline fluid that helps neutralize gastric acid.

4. **Analyze Statement D**:
- Statement D states that "Carboxypeptidase catalyzes the conversion of proteins, peptones, and proteoses into dipeptides."
- This statement is **correct**. Carboxypeptidase is an enzyme that hydrolyzes peptide bonds in proteins and breaks them down into smaller units, including dipeptides.

5. **Conclusion**:
- After analyzing all four statements, we find that Statement A is the only incorrect statement. Therefore, the correct answer to the question is **Option A**.

### Final Answer:
Hence, the correct answer is **Option A**: "Lipases and Nucleases are not present in pancreatic juice."