Crystalline rocks are natural source of biogenetic element

Options

A. Calcium
B. Phosphorus
C. Magnesium
D. Sodium

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question:**
The question asks about the relationship between crystalline rocks and biogenetic elements. We need to identify which biogenetic element can be sourced from crystalline rocks.

2. **Identifying Biogenetic Elements:**
Biogenetic elements are essential elements that are found in living organisms. Common biogenetic elements include Calcium, Phosphorus, Magnesium, and Sodium.

3. **Analyzing Crystalline Rocks:**
Crystalline rocks are geological formations that can contain various minerals. We need to determine which of the biogenetic elements mentioned is primarily sourced from these rocks.

4. **Identifying the Relevant Element:**
Among the elements listed, Phosphorus is known to be present in the form of phosphates in crystalline rocks. Phosphates are crucial for biological functions, including energy transfer and genetic material formation.

5. **Conclusion:**
Based on the analysis, the correct answer to the question is that crystalline rocks are a natural source of Phosphorus, which is a biogenetic element.

6. **Final Answer:**
The answer is option B: Phosphorus.

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