Conjoint , collateral vascular bundles are found in :-
(1) Stems
(2) Leaves
(3) Roots
(4) Both (1) & (2)

Options

A. Stems
B. Leaves
C. Roots
D. Both (1) & (2)

Answer

To solve the question regarding where conjoint collateral vascular bundles are found, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Definition**:
- Conjoint collateral vascular bundles are those in which both xylem and phloem are present together. In these bundles, the phloem is located above the xylem.

2. **Identify the Types of Vascular Bundles**:
- There are two types of collateral vascular bundles:
- **Open Collateral Bundles**: These have a cambium layer between xylem and phloem, allowing for secondary growth (commonly found in dicots).
- **Closed Collateral Bundles**: These lack a cambium layer and do not allow for secondary growth (commonly found in monocots).

3. **Evaluate the Options**:
- **(1) Stems**: Stems typically contain conjoint collateral vascular bundles, both open and closed, depending on whether they are dicots or monocots.
- **(2) Leaves**: Leaves do not have a collateral arrangement; they have a different type of vascular arrangement.
- **(3) Roots**: Roots generally do not have conjoint collateral vascular bundles; they have a different vascular structure.
- **(4) Both (1) & (2)**: Since leaves do not have collateral vascular bundles, this option is incorrect.

4. **Conclusion**:
- Based on the analysis, the correct answer is **(1) Stems**, as they are the primary structures where conjoint collateral vascular bundles are found.

### Final Answer:
**(1) Stems**