Assertion:In some leguminous plant, the leaf base is swollen.
Reason:The swollen leaf base is called pulvinus.

Options

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

Explanation

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

### Step 1: Understanding the Assertion
The assertion states that "In some leguminous plants, the leaf base is swollen."
- Leguminous plants, which belong to the family Fabaceae, often exhibit a variety of morphological adaptations. One such adaptation is the swelling of the leaf base in certain species.

### Step 2: Understanding the Reason
The reason states that "The swollen leaf base is called pulvinus."
- The term "pulvinus" refers to a swollen structure at the base of the leaf stalk (petiole) in some plants. This structure can facilitate movement in response to environmental stimuli, such as light or touch, by allowing the leaf to change its angle.

### Step 3: Evaluating the Relationship
Now, we need to evaluate whether the reason correctly explains the assertion.
- The assertion is correct as some leguminous plants do have swollen leaf bases.
- The reason is also correct because the swollen leaf base is indeed referred to as a pulvinus.

### Step 4: Conclusion
Since both the assertion and reason are true, and the reason correctly explains the assertion, we can conclude that the statement is valid.

### Final Answer:
Both the assertion and the reason are true, and the reason correctly explains the assertion.

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