In endarch condition of xylem, protoxylem lies ______of metaxylem.

Options

A. on inner side
B. on outer side
C. both on inner and outer side
D. in center

Answer

To answer the question regarding the position of protoxylem in the endarch condition of xylem, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Endarch Condition**:
- In the endarch condition of xylem, the development of protoxylem occurs from the innermost procambium cells.

2. **Location of Protoxylem**:
- The protoxylem is formed first during the development of the xylem and is located closer to the center of the plant organ.

3. **Formation Sequence**:
- Protoxylem develops before the plant organs are fully grown, meaning it is the first xylem to form. After the protoxylem, the metaxylem is formed.

4. **Position Relative to Metaxylem**:
- Since protoxylem is formed first and is located towards the center, the metaxylem surrounds the protoxylem. Therefore, in the endarch condition, the protoxylem lies towards the center of the metaxylem.

5. **Final Answer**:
- Therefore, in the endarch condition of xylem, protoxylem lies **in the center** of metaxylem.