Select the incorrect statement-

Options

A. Amino acids are substituent methanes
B. Glycerol is trihydroxy propane
C. Lysine is a neutral amino acid
D. Lecithin is a phospholipid

Explanation

To determine the incorrect statement among the provided options, let's analyze each statement step by step.

### Step-by-Step Solution:

1. **Understanding Amino Acids**:
- Amino acids are the building blocks of proteins. They contain an amino group (-NH2), a carboxyl group (-COOH), and a side chain (R group) that varies among different amino acids.

**Hint**: Remember that amino acids are fundamental components of proteins.

2. **Statement Analysis**:
- **Statement 1**: "Amino Acids are Substituent Methanes."
- This statement is true. Amino acids can be thought of as derivatives of methane (CH4) where hydrogen atoms are replaced by amino and carboxyl groups along with the side chain.

**Hint**: Consider the structure of amino acids and how they relate to methane.

3. **Statement 2**: "Glycerol is a trihydroxy propane."
- This statement is also true. Glycerol (C3H8O3) is indeed a trihydroxy alcohol, meaning it has three hydroxyl (-OH) groups, and it can be derived from propane.

**Hint**: Recall the chemical structure of glycerol and its classification.

4. **Statement 3**: "Lysine is a neutral Amino Acid."
- This statement is false. Lysine is actually a basic amino acid due to the presence of an additional amino group in its side chain, making it positively charged at physiological pH.

**Hint**: Think about the classification of amino acids based on their side chains and charges.

5. **Statement 4**: "Lecithin is a phospholipid."
- This statement is true. Lecithin is a type of phospholipid that is an important component of cell membranes.

**Hint**: Remember the role of lecithin in biological membranes.

6. **Conclusion**:
- After analyzing all the statements, the incorrect statement is the one regarding lysine. Thus, the answer is option C: "Lysine is a neutral Amino Acid."

### Final Answer:
The incorrect statement is: **C. Lysine is a neutral Amino Acid.**