The best source of vitamin A is

Options

A. wheat
B. carrots
C. oranges
D. beans

Explanation

### Step-by-Step Solution:

1. **Understanding Vitamin A**:
- Vitamin A is a fat-soluble vitamin that plays a crucial role in various bodily functions, including vision, growth, and immune function.

2. **Identifying Sources of Vitamin A**:
- The question provides four options: wheat, carrots, oranges, and beans. We need to evaluate these options based on their vitamin A content.

3. **Evaluating Each Option**:
- **Wheat**: Primarily a source of carbohydrates and vitamin B, not significant for vitamin A.
- **Carrots**: Known for their high beta-carotene content, which the body converts into vitamin A.
- **Oranges**: Rich in vitamin C but not a significant source of vitamin A.
- **Beans**: Good for protein and some vitamins, but not a primary source of vitamin A.

4. **Conclusion**:
- Among the options provided, carrots are the best source of vitamin A due to their high beta-carotene content, which is converted into vitamin A in the body.

5. **Final Answer**:
- The best source of vitamin A is **carrots**.