Hormones are

Options

A. Destroyed after use
B. Not destroyed after use
C. Non antigenic
D. 1 and 3 both

Answer

### Step-by-Step Solution:

1. **Understanding Hormones**: Hormones are chemical messengers produced by glands in the endocrine system. They travel through the bloodstream to target organs and tissues to regulate various physiological processes.

2. **Analyzing the Options**:
- **Option 1**: "Hormones are destroyed after use."
- This statement is correct. Hormones perform their function and are then metabolized and destroyed, primarily by the liver and target tissues.

- **Option 2**: "Hormones are not destroyed after use."
- This statement is incorrect. As mentioned, hormones are indeed destroyed after they have exerted their effects.

- **Option 3**: "Hormones are non-antigenic."
- This statement is correct. Hormones do not typically provoke an immune response and do not produce antibodies against them.

- **Option 4**: "1st and 3rd both."
- Since both the first and third options are correct, this option is also correct.

3. **Conclusion**: The correct answer is **Option 4**, as it includes both correct statements regarding hormones.