Which of the following is not a source of vitamin A

Options

A. Carrot
B. Yeast
C. Mango
D. Apple

Answer

To determine which of the following is not a source of vitamin A among the options provided (carrot, yeast, mango, apple), we can follow these steps:

### Step 1: Understand Vitamin A Sources
Vitamin A can be obtained from various food sources. It exists in two primary forms: preformed vitamin A (retinol) found in animal products and provitamin A carotenoids (like beta-carotene) found in plant-based foods.

### Step 2: Analyze Each Option
- **Carrot**: Carrots are rich in beta-carotene, which the body converts into vitamin A. Therefore, carrots are a source of vitamin A.

- **Yeast**: Yeast is primarily used in fermentation and does not contain significant amounts of vitamin A. It is not considered a source of vitamin A.

- **Mango**: Mangoes are also a source of beta-carotene, making them a source of vitamin A.

- **Apple**: Apples contain small amounts of beta-carotene, but they are not a significant source of vitamin A compared to other fruits and vegetables.

### Step 3: Identify the Correct Answer
From the analysis:
- Carrot, mango, and to a lesser extent apple, are sources of vitamin A.
- Yeast does not provide vitamin A.

Thus, the correct answer is **yeast**, as it is not a source of vitamin A.

### Final Answer
Yeast is not a source of vitamin A.

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