Which one of the following is a trace element for animal body?
(a) Phosphorus
(b) Magnesium
(c) Chlorine
(d) Manganese

Options

A. Phosphorus
B. Magnesium
C. Chlorine
D. Manganese

Answer

To determine which of the following options is a trace element for the animal body, we need to analyze each option provided:

1. **Understanding Trace Elements**:
- Trace elements are minerals present in the body in very small amounts. They are essential for various physiological functions but are required in minute quantities.

2. **Analyzing the Options**:
- **(a) Phosphorus**: This element is not a trace element; it is found in larger amounts in the body and is crucial for the formation of nucleic acids and energy molecules like ATP.
- **(b) Magnesium**: Similar to phosphorus, magnesium is also present in significant amounts and plays a vital role in enzymatic reactions and muscle function.
- **(c) Chlorine**: Chlorine is another element that is present in larger quantities in the body, primarily involved in maintaining osmotic balance and forming hydrochloric acid in the stomach.
- **(d) Manganese**: Manganese is known to be a trace element. It is required in small amounts and is essential for the production of mucopolysaccharides, which are important for the organic matrix of bones.

3. **Conclusion**:
- Based on the analysis, the only element that qualifies as a trace element is **(d) Manganese**.

Thus, the correct answer is **(d) Manganese**.

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