Excretion is enteronephric by which of the following nephridia -

Options

A. Integumentary and septai nephridia
B. Integumentary and pharyngeal
C. integumentary, septal and pharyngeal nephridia
D. Septal and pharyngeal nephridia

Answer

**Step-by-Step Solution:**

1. **Understanding Excretion Types:**
- Excretion can be classified into two types: enteronephric and exonephric.
- Enteronephric means that waste products are discharged into the intestine.
- Exonephric means that waste products are expelled outside the body.

2. **Analyzing the Options:**
- The question asks which nephridia are involved in enteronephric excretion.
- We will evaluate the provided options to determine which one corresponds to enteronephric excretion.

3. **Option Evaluation:**
- **First Option: Inter-gumentary and Septic Nephridia**
- These types of nephridia release waste products outside the body, thus they are exonephric.
- **Second Option: Inter-gumentary and Septic Nephridia**
- Similar to the first option, these also refer to waste being expelled outside the body.
- **Third Option: Pharyngeal Nephridia**
- Pharyngeal nephridia discharge waste into the intestine, indicating enteronephric excretion.
- **Fourth Option: Septal and Pharyngeal Nephridia**
- Septal nephridia are known to be involved in enteronephric excretion as they also release waste into the intestine.

4. **Conclusion:**
- The correct answer is the option that includes both pharyngeal and septal nephridia, as they are responsible for enteronephric excretion.

5. **Final Answer:**
- The correct option is **Septal and Pharyngeal Nephridia**.

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