Read the following statements about a leaf. Which amongst them are correct.
I.The swollen leaf- base mainly seen in leguminous plants is called the pulvinus.
II. The axillary bud arises from the axil formed by the leaf.
III. The leaf shape and size differs from plant to plant.

Options

A. Only I
B. I, II and III
C. I and III
D. I and II

Answer

To determine which statements about a leaf are correct, let's analyze each statement one by one.

### Step 1: Analyze Statement I
**Statement I:** The swollen leaf base mainly seen in leguminous plants is called the pulvinus.

- **Explanation:** This statement is correct. The pulvinus is indeed the swollen leaf base found in many leguminous plants. It plays a role in the movement of leaves and leaflets in response to light and gravity.

### Step 2: Analyze Statement II
**Statement II:** The axillary bud arises from the axil formed by the leaf.

- **Explanation:** This statement is also correct. The axillary bud is located in the axil, which is the angle between the leaf and the stem. This bud can develop into a branch or flower.

### Step 3: Analyze Statement III
**Statement III:** The leaf shape and size differs from plant to plant.

- **Explanation:** This statement is correct as well. Leaf shape and size can vary greatly among different plant species due to adaptations to their environments and evolutionary pressures.

### Conclusion
All three statements are correct regarding the characteristics of leaves. Therefore, the correct answer is that all statements (I, II, and III) are correct.

### Final Answer
The correct statements about a leaf are:
- I. The swollen leaf base mainly seen in leguminous plants is called the pulvinus.
- II. The axillary bud arises from the axil formed by the leaf.
- III. The leaf shape and size differs from plant to plant.