Assertion: Anaerobic respiration occurs in the aquatic organisms.
Reason: Aquatic organisms are never autotrophic.

Options

A. If both As and R are correct and R is correct explanation of As
B. If both As and R are correct but R is not correct explanation of As
C. If As is correct, R is wrong
D. If both As and R are wrong.

Answer

To solve the assertion and reason question, we will analyze both statements separately and determine their validity.

### Step 1: Analyze the Assertion
The assertion states: "Anaerobic respiration occurs in the aquatic organisms."

- **Definition of Anaerobic Respiration**: This type of respiration occurs in the absence of oxygen. It is a process where organisms convert glucose into energy without using oxygen.
- **Aquatic Organisms**: These are organisms that live in water. In aquatic environments, oxygen is often dissolved in water, making aerobic respiration (which requires oxygen) the primary mode of respiration for most aquatic organisms.

**Conclusion for Assertion**: The assertion is **false** because while some aquatic organisms can perform anaerobic respiration under specific conditions (like stagnant water where oxygen levels are low), the general statement that anaerobic respiration occurs in aquatic organisms is misleading.

### Step 2: Analyze the Reason
The reason states: "Aquatic organisms are never autotrophic."

- **Definition of Autotrophic Organisms**: Autotrophs are organisms that can produce their own food through processes like photosynthesis or chemosynthesis.
- **Examples in Aquatic Environments**: Many aquatic organisms, such as certain algae, phytoplankton, and some bacteria, are indeed autotrophic as they can produce their own food using sunlight or chemical processes.

**Conclusion for Reason**: The reason is **false** because there are many autotrophic organisms in aquatic environments.

### Step 3: Determine the Relationship
Since both the assertion and the reason are false, and the reason does not support the assertion, we conclude that:

- **Final Answer**: Both assertion and reason are false.

### Summary
- Assertion: False
- Reason: False
- Conclusion: Both assertion and reason are false.

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