The organic compound which is required in minute quantities in order to maintain good health of the living organism is :

Options

A. Vitamin
B. Protein
C. Lipid
D. Carbohydrate

Answer

To solve the question regarding the organic compound required in minute quantities for maintaining good health in living organisms, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Options**: The options provided are:
- A) Vitamin
- B) Protein
- C) Lipid
- D) Carbohydrate

2. **Understand the Role of Each Compound**:
- **Vitamins**: These are organic compounds that are essential for various bodily functions, including cell growth, metabolism, and overall health. They are required in very small amounts.
- **Proteins**: These are large biomolecules made up of amino acids and are crucial for building and repairing tissues. They are not required in minute quantities; rather, they are needed in larger amounts.
- **Lipids**: These are fats and oils that serve as energy sources and are important for cell structure. Like proteins, they are also needed in larger quantities.
- **Carbohydrates**: These are the body's primary source of energy. They are needed in significant amounts for energy production.

3. **Determine the Correct Answer**:
- Since the question specifically asks for an organic compound required in minute quantities, the only option that fits this description is **Vitamins**. They are essential for health but needed in much smaller amounts compared to proteins, lipids, and carbohydrates.

4. **Conclusion**: Therefore, the organic compound which is required in minute quantities in order to maintain good health of living organisms is **Vitamins**.

### Final Answer:
The correct answer is **A) Vitamin**.