Lateral meristems are
(a) Phellogen and procambium
(b) Procambium and dermatogen
(c) Fascicular cambium and procambium
(d) Fascicular cambium and cork cambium

Options

A. Phellogen and procambium
B. Procambium and dermatogen
C. Fascicular cambium nd procambium
D. Fascicular cambium and cork cambium

Answer

To determine which options correctly identify lateral meristems, we can analyze each option based on the definition and types of lateral meristems.

### Step-by-Step Solution:

1. **Understand Lateral Meristems**:
- Lateral meristems are responsible for secondary growth in plants, which increases the thickness or girth of the plant.

2. **Identify Types of Lateral Meristems**:
- The two main types of lateral meristems are:
- **Cork Cambium (Phellogen)**: Responsible for producing the outer protective layer (cork) of the plant.
- **Vascular Cambium (Fascicular Cambium)**: Responsible for producing secondary xylem (wood) and secondary phloem.

3. **Analyze Each Option**:
- **Option (a)**: Phellogen and procambium
- Phellogen is a lateral meristem, but procambium is not a lateral meristem; it is involved in primary growth.
- **Option (b)**: Procambium and dermatogen
- Neither procambium nor dermatogen are lateral meristems.
- **Option (c)**: Fascicular cambium and procambium
- Fascicular cambium is a lateral meristem, but procambium is not.
- **Option (d)**: Fascicular cambium and cork cambium
- Both fascicular cambium and cork cambium are lateral meristems.

4. **Conclusion**:
- The correct answer is **(d) Fascicular cambium and cork cambium** as both are recognized as lateral meristems responsible for secondary growth.

### Final Answer:
**(d) Fascicular cambium and cork cambium**

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