Bundle sheath extensions in a dicot leaf and in a monocot leaf are ______and______respectively.

Options

A. parenchymatous, collenchymatous
B. parenchymatous, sclerenchymatous
C. sclerechymatous, parenchymatous
D. collenchymatous, sclerenchymatous

Explanation

To answer the question regarding the bundle sheath extensions in a dicot leaf and in a monocot leaf, we will analyze the characteristics of the bundle sheath in both types of leaves.

### Step-by-Step Solution:

1. **Understanding Bundle Sheath in Dicot Leaves:**
- In dicot leaves, the bundle sheath is typically **single-layered**.
- The cells that make up this layer are generally **colorless** and are classified as **parenchymatous** cells.
- Therefore, for dicot leaves, the bundle sheath extensions are **parenchymatous**.

2. **Understanding Bundle Sheath in Monocot Leaves:**
- In monocot leaves, the bundle sheath can be either **single-layered or double-layered**.
- The cells in this layer usually contain **chloroplasts**, indicating that they can perform photosynthesis.
- The bundle sheath extensions in monocots are typically **sclerenchymatous**.

3. **Final Answer:**
- Thus, the bundle sheath extensions in a dicot leaf and in a monocot leaf are **parenchymatous** and **sclerenchymatous**, respectively.