Fibrovascular bundles or vascular bundles covered but sclerenchymatous sheath are found in
(a) monocot root
(b) dicot roots
(c) monocot stems
(d) dicot stem

Options

A. monocot leaf
B. monocot stem
C. monocot root
D. dicot stem.

Answer

To solve the question regarding where fibrovascular bundles or vascular bundles covered with a sclerenchymatous sheath are found, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Structure of Vascular Bundles**: Vascular bundles are composed of xylem and phloem and can be surrounded by different types of tissues depending on the plant type (monocot or dicot).

2. **Identify the Types of Plant Structures**:
- **Monocot Roots**: Typically do not have a sclerenchymatous sheath surrounding their vascular bundles.
- **Dicot Roots**: Similar to monocot roots, they also lack a sclerenchymatous sheath.
- **Dicot Stems**: In dicot stems, the vascular bundles are usually arranged in a ring and are not covered by a sclerenchymatous sheath.
- **Monocot Stems**: In monocot stems, the vascular bundles are scattered and are covered by a sclerenchymatous sheath known as the sclerenchymatous bundle sheath.

3. **Analyze Each Option**:
- (a) Monocot root - No sclerenchymatous sheath.
- (b) Dicot root - No sclerenchymatous sheath.
- (c) Monocot stems - Have a sclerenchymatous sheath covering the vascular bundles.
- (d) Dicot stem - No sclerenchymatous sheath.

4. **Conclusion**: Based on the analysis, the only option where fibrovascular bundles are covered with a sclerenchymatous sheath is in monocot stems.

### Final Answer:
(c) monocot stems

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