A: Leghaemoglobin is a compound of Iron and is present in the root nodules of leguminous plants.
R: It acts as an oxygen scavenger and forms a temporary compound by combining with oxygen.

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 provided, we will analyze both statements step by step.

### Step 1: Analyze the Assertion
The assertion states that "Leghaemoglobin is a compound of Iron and is present in the root nodules of leguminous plants."

- **Explanation**: Leghaemoglobin is indeed a heme-containing protein that contains iron. It is found in the root nodules of leguminous plants, which are plants that belong to the family Fabaceae. The primary role of leghaemoglobin is to facilitate the process of nitrogen fixation by providing an anaerobic environment necessary for the nitrogen-fixing bacteria (like Rhizobium) that reside in these nodules.

### Step 2: Analyze the Reason
The reason states that "It acts as an oxygen scavenger and forms a temporary compound by combining with oxygen."

- **Explanation**: Leghaemoglobin functions as an oxygen scavenger. It binds to oxygen molecules, thus preventing free oxygen from damaging the nitrogenase enzyme, which is crucial for the nitrogen fixation process. By binding to oxygen, leghaemoglobin helps maintain an anaerobic environment in the root nodules, allowing the nitrogen-fixing bacteria to function effectively. This binding forms a temporary compound, which is essential for the proper functioning of the nitrogenase enzyme.

### Step 3: Conclusion
Both the assertion and the reason are true, and the reason correctly explains the assertion. Therefore, the correct answer to the question is that both statements are true, and the reason is a correct explanation of the assertion.

### Final Answer:
Both the assertion and the reason are true, and the reason is the correct explanation for the assertion.

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