Protoxylem is towards pith and metaxylem is towards periphery in

Options

A. (i) endarch xylem
B. (ii) exarch xylem
C. (iii) diarch xylem
D. (iv) hexarch xylem

Answer

To solve the question regarding the arrangement of protoxylem and metaxylem, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Terms**:
- Protoxylem: The first-formed xylem that develops during the growth of a plant.
- Metaxylem: The later-formed xylem that develops after protoxylem.

2. **Identify the Arrangement**:
- The question states that protoxylem is towards the pith (the central part of the stem) and metaxylem is towards the periphery (the outer part of the stem).

3. **Recall Xylem Types**:
- There are different types of xylem arrangements in plants:
- Endarch: Protoxylem is located towards the center (pith) and metaxylem towards the outside (periphery).
- Exarch: Protoxylem is located towards the outside and metaxylem towards the center.
- Diarch and Hexarch: These terms refer to the number of xylem strands but do not specifically relate to the arrangement of protoxylem and metaxylem.

4. **Match the Arrangement with the Correct Type**:
- Given that protoxylem is towards the pith and metaxylem is towards the periphery, this arrangement corresponds to the endarch type of xylem.

5. **Select the Correct Option**:
- Among the options provided:
- Option 1: Indax xylem (this seems to be a typo, it should be Endarch xylem)
- Option 2: Exarch xylem
- Option 3: Digax xylem
- Option 4: Hexarch xylem
- The correct answer is Endarch xylem (option 1).

### Final Answer:
The correct answer is Endarch xylem.

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