The richest sources of vitamin `B_(12)` are

Options

A. goat's liver and Spirulina
B. Chocolate and green gram
C. rice and hen's egg
D. carrot and chicken's breast

Explanation

### Step-by-Step Solution:

1. **Understanding Vitamin B12**: Vitamin B12, also known as cyanocobalamin, is a water-soluble vitamin that plays a crucial role in the formation of red blood cells and the maintenance of the nervous system.

2. **Identifying Sources of Vitamin B12**: Vitamin B12 is primarily found in animal products. The richest sources include various types of meat, fish, dairy products, and eggs.

3. **Evaluating Options**: In the question, we need to identify the richest sources of Vitamin B12 from the given options. The options mentioned are goat's liver and spirulina.

4. **Analyzing Goat's Liver**: Goat's liver is known to be an excellent source of Vitamin B12. Organ meats, in general, are among the highest in vitamin B12 content.

5. **Analyzing Spirulina**: Spirulina is a type of blue-green algae that is often marketed as a dietary supplement. While it contains some vitamin B12, the form of B12 in spirulina is not as bioavailable as that found in animal products.

6. **Conclusion**: Based on the analysis, the richest sources of Vitamin B12 from the options provided are goat's liver and spirulina. However, goat's liver is considered the superior source.

### Final Answer:
The richest sources of Vitamin B12 are goat's liver and spirulina.

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