Which of the following set contain only essential Amino acids ?

Options

A. Alanine, Tyrosine, Cysteine
B. Leucine, Lysine, tryptophan
C. Alanine, glutamine, Lysine
D. Leucine, Proline, glycine

Explanation

To determine which set contains only essential amino acids, we first need to identify what essential amino acids are. Essential amino acids are those that cannot be synthesized by the body and must be obtained from the diet. There are 10 essential amino acids that are commonly recognized:

1. Arginine (conditionally essential)
2. Histidine
3. Isoleucine
4. Leucine
5. Lysine
6. Methionine
7. Phenylalanine
8. Threonine
9. Tryptophan
10. Valine

Now, let's analyze the options provided:

1. **Option 1:** Alanine, Tyrosine, Cysteine
- **Alanine**: Non-essential
- **Tyrosine**: Non-essential (can be synthesized from phenylalanine)
- **Cysteine**: Non-essential (can be synthesized from methionine)
- **Conclusion**: This option does not contain only essential amino acids.

2. **Option 2:** Leucine, Lysine, Tryptophan
- **Leucine**: Essential
- **Lysine**: Essential
- **Tryptophan**: Essential
- **Conclusion**: This option contains only essential amino acids.

3. **Option 3:** Alanine, Butamin, Lysine, Leucine, Proline, Glycine
- **Alanine**: Non-essential
- **Butamin**: Not a standard amino acid (possibly a typo)
- **Lysine**: Essential
- **Leucine**: Essential
- **Proline**: Non-essential
- **Glycine**: Non-essential
- **Conclusion**: This option does not contain only essential amino acids.

After analyzing the options, we find that **Option 2 (Leucine, Lysine, Tryptophan)** is the only set that contains only essential amino acids.

### Final Answer:
The set that contains only essential amino acids is **Leucine, Lysine, Tryptophan**.