Lysine and tryptophan are

Options

A. proteins
B. non- essential amino acids
C. Essential amino acids
D. aromatic acids

Explanation

**Step-by-Step Solution:**

1. **Understanding Amino Acids**: Amino acids are the building blocks of proteins and play a crucial role in various biological processes in the body.

2. **Classification of Amino Acids**: Amino acids can be classified into two main categories:
- **Essential Amino Acids**: These are amino acids that the body cannot synthesize on its own. Therefore, they must be obtained through the diet.
- **Non-Essential Amino Acids**: These amino acids can be produced by the body, so there is no need to obtain them from dietary sources.

3. **Identifying Lysine and Tryptophan**: Both lysine and tryptophan fall under the category of essential amino acids. This means:
- The body does not produce lysine.
- The body does not produce tryptophan.
- Both must be included in the diet to meet the body's needs.

4. **Conclusion**: Since lysine and tryptophan are essential amino acids, it is important to consume foods that provide these amino acids to maintain proper health and support various bodily functions.

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