Ketone bodies consist of

Options

A. Nicotinic acid, folic acid and ascorbic acid
B. Acetone, beta hydroxybututyryl CoA and acetoacetic acid
C. Acetoacetic acid, acetone and beta hydroxybutyric acid
D. Acetic acid, acetone and beta hydroxybutyric acid

Answer

### Step-by-Step Solution:

1. **Understanding Ketone Bodies**: Ketone bodies are produced during the metabolism of fats, particularly when the body is in a state of fasting or starvation. They serve as an alternative energy source when glucose is scarce.

2. **Identifying the Components**: The question asks about the composition of ketone bodies. The common ketone bodies produced during fat metabolism include:
- Acetoacetic acid
- Acetone
- Beta-hydroxybutyric acid

3. **Analyzing the Options**:
- **Option 1**: Nicotinic acid, folic acid, and ascorbic acid - These are vitamins and not ketone bodies.
- **Option 2**: Acetone, beta hydroxybutyryl coenzyme A, and acetoacetic acid - Beta hydroxybutyryl coenzyme A is not a ketone body.
- **Option 3**: Acetoacetic acid, acetone, and beta-hydroxybutyric acid - This option contains all three correct ketone bodies.
- **Option 4**: Acetic acid, acetone, and beta-hydroxybutyric acid - Acetic acid is not a ketone body.

4. **Conclusion**: The correct answer is **Option 3**: Acetoacetic acid, acetone, and beta-hydroxybutyric acid, as these are the recognized ketone bodies produced during fat metabolism.