In which one of the following organisms, its excretory organs are correctly matched?

Options

A. Humans Kidneys, sebaceous glands and tear glands
B. Earthworm-Pharyngeal, integumentary and septal nephridia
C. Cockroach-Malpighian tubules and enteric caecae
D. Frog-Kidneys, skin and buccal epithelium

Answer

To determine which organism has correctly matched excretory organs, we will analyze each option provided in the question.

### Step-by-Step Solution:

1. **Option 1: Humans - Kidneys, Sebaceous Gland, Tear Glands**
- **Analysis**:
- Kidneys are indeed the primary excretory organs in humans.
- Sebaceous glands are exocrine glands that secrete sebum, which lubricates the skin and hair, but they are not excretory organs.
- Tear glands (lacrimal glands) produce tears for lubrication and protection of the eyes, but they do not have an excretory function.
- **Conclusion**: This option is incorrect.

2. **Option 2: Earthworm - Pharyngeal Nephridia, Integumentary Nephridia, Septal Nephridia**
- **Analysis**:
- Earthworms possess three types of nephridia: pharyngeal nephridia (located in the anterior region), integumentary nephridia (found in the skin), and septal nephridia (located between segments).
- All these structures function in excretion.
- **Conclusion**: This option is correct.

3. **Option 3: Cockroach - Malpighian Tubules, Enteric C.k**
- **Analysis**:
- Malpighian tubules are the excretory organs in cockroaches, responsible for removing waste.
- The term "enteric c.k" is likely a misnomer, as it does not refer to a recognized excretory structure but rather relates to the digestive system.
- **Conclusion**: This option is incorrect.

4. **Option 4: Frog - Kidney, Skin, Buccal Epithelium**
- **Analysis**:
- Frogs do have kidneys as excretory organs.
- The skin and buccal epithelium are primarily involved in respiration rather than excretion.
- **Conclusion**: This option is incorrect.

### Final Answer:
The organism with correctly matched excretory organs is **Earthworm** (Option 2).

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