Assertion: Digestion is chiefly extracellular in Ctenophores.
Reason:In Ctenophores, digestive tract is incomplete.

Options

A. If both assertion and reason are true and reason is the correct explanation of assertion.
B. If both assertion and reason are true but reason is not the correct explanation of assertion.
C. If assertion is true but reason is false.
D. If both assertion and reason are false.

Explanation

To analyze the assertion and reason provided in the question, we can break down the information step by step.

### Step-by-Step Solution:

1. **Understanding the Assertion**: The assertion states that "Digestion is chiefly extracellular in Ctenophores."
- **Analysis**: Ctenophores, commonly known as comb jellies, are known to have both intracellular and extracellular digestion. However, the assertion claims that extracellular digestion is the primary mode, which needs further investigation.

2. **Understanding the Reason**: The reason states that "In Ctenophores, the digestive tract is incomplete."
- **Analysis**: This statement is factually incorrect. Ctenophores possess a complete digestive tract, which includes both a mouth and an anus. This means that food passes through a tubular pharynx and into branched canals, indicating a complete digestive system.

3. **Evaluating the Truth of the Statements**:
- **Assertion Evaluation**: Since Ctenophores have both types of digestion, but the assertion claims it is chiefly extracellular, this part is false.
- **Reason Evaluation**: The reason is also false because Ctenophores do have a complete digestive tract.

4. **Conclusion**: Both the assertion and the reason are false. Therefore, the assertion does not correctly explain the reason, as both statements are incorrect.

### Final Answer:
Both the assertion and the reason are false.

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