Consider the following statement and choose the correct option
(i) The thread like cytoplasmic strands, running from one cell to other is known as plasmodesmata
(ii) Xylem and phloem constitute the vascular bundle of the stem
(iii)The first form xylem elements are described as metaxylem
(iv) Radial vascular bundles are mainly found in the leaves

Options

A. a, b true, c , d wrong
B. d true, a, b, c wrong
C. d true, a, b, d wrong
D. b true, a, c, d wrong

Answer

To solve the question regarding the statements about plant anatomy, we will analyze each statement one by one to determine their correctness.

### Step-by-Step Solution:

1. **Statement (i): "The thread-like cytoplasmic strands, running from one cell to another is known as plasmodesmata."**
- **Analysis**: Plasmodesmata are indeed thread-like structures that connect the cytoplasm of adjacent plant cells, allowing for communication and transport of materials between them.
- **Conclusion**: This statement is **correct**.

2. **Statement (ii): "Xylem and phloem constitute the vascular bundle of the stem."**
- **Analysis**: Xylem and phloem are the two main types of vascular tissues in plants. They form the vascular bundles, which are essential for the transport of water, nutrients, and food throughout the plant.
- **Conclusion**: This statement is **correct**.

3. **Statement (iii): "The first formed xylem elements are described as metaxylem."**
- **Analysis**: In plant development, the first formed xylem is actually called protoxylem, while metaxylem forms later as the plant grows. Therefore, this statement is incorrect.
- **Conclusion**: This statement is **incorrect**.

4. **Statement (iv): "Radial vascular bundles are mainly found in the leaves."**
- **Analysis**: Radial vascular bundles are typically found in the roots and stems, not primarily in the leaves. In leaves, vascular bundles are usually arranged differently (e.g., in a parallel or reticulate pattern).
- **Conclusion**: This statement is **incorrect**.

### Final Evaluation:
- Statements (i) and (ii) are correct.
- Statements (iii) and (iv) are incorrect.

### Correct Option:
The correct option includes statements (i) and (ii) as true, while (iii) and (iv) are false.