Vascularization in plants occurs through

Options

A. Differentiation of procambium followed by primary phloem and then primary xylem
B. Differentiation of procambium followed by development of xylem and phloem
C. Simulaneous differenation of procambium, xylem, and phloem
D. Differentiation of procambium which is immediately followed by the development of secondary xylem and secondary phloem

Answer

### Step-by-Step Solution:

1. **Understanding Vascularization**: Vascularization in plants refers to the development of vascular tissues, which are essential for the transport of water, nutrients, and food throughout the plant. It occurs in two main stages: primary vascularization and secondary vascularization.

2. **Primary Vascularization**: This involves the primary growth of the plant. The primary vascularization is characterized by the differentiation of procambium, which is a type of meristematic tissue responsible for forming vascular tissues.

3. **Differentiation of Procambium**: The first step in vascularization is the differentiation of procambium. This tissue will eventually give rise to the primary vascular tissues.

4. **Development of Xylem and Phloem**: Following the differentiation of procambium, the next step is the development of xylem and phloem. Xylem is responsible for the transport of water and minerals, while phloem transports food.

5. **Conclusion**: Based on the steps outlined, vascularization in plants occurs through the differentiation of procambium, followed by the development of xylem and phloem. Therefore, the correct answer to the question is **Option B**: differentiation of procambium followed by development of xylem and phloem.