Essential fatty acids were discovered by

Options

A. Evans and Burr
B. Bloor
C. Sutherland
D. Beer.

Answer

### Step-by-Step Solution:

1. **Understanding Essential Fatty Acids**:
- Essential fatty acids are types of fats that are crucial for human health but cannot be synthesized by the body. This means that they must be obtained through diet.

2. **Role of Essential Fatty Acids**:
- These fatty acids play significant roles in various biological processes, including energy production and cellular function. They are not stored in the body but are used as a source of fuel.

3. **Examples of Essential Fatty Acids**:
- Common examples of essential fatty acids include alpha-linolenic acid (omega-3) and linoleic acid (omega-6). These acids are vital for maintaining health and supporting various bodily functions.

4. **Discovery of Essential Fatty Acids**:
- The discovery of essential fatty acids is attributed to researchers Evans and Burr. They conducted studies that identified these fatty acids and their importance in human nutrition.

5. **Conclusion**:
- Therefore, the correct answer to the question "Essential fatty acids were discovered by" is **Evans and Burr**.