Mark the odd one w.r.t . T.S. of a plant's part

Options

A. Vascular bundles are arranged in ring
B. Epidermis is covered by a tin layer of cuticle
C. The cells of the endodermis have a deposition of water - impermeable, waxy material called lignin
D. Pericycle contains both sclerenchyma and parenchyma

Answer

To solve the question of marking the odd one with respect to the tissue system of a plant's part, we will analyze each option provided.

### Step-by-Step Solution:

1. **Option 1: Vascular bundles are arranged in a ring.**
- In dicot stems, vascular bundles are indeed arranged in a ring formation. This is a characteristic feature of dicots.
- **Conclusion:** This option is correct.

2. **Option 2: Epidermis is covered by a thin layer of cuticle.**
- The epidermis is the outermost layer of the plant and is covered by a thin layer of cuticle, which serves as a protective barrier against water loss and environmental factors.
- **Conclusion:** This option is also correct.

3. **Option 3: The cells of the endodermis have a deposition of water impermeable waxy material called lignin.**
- The endodermis does have a water impermeable layer, but it is not made of lignin. Instead, the endodermis contains suberin, which is the waxy material that provides this impermeability.
- **Conclusion:** This option is incorrect because it contains a factual error regarding the composition of the endodermis.

4. **Option 4: Pericycle contains both sclerenchyma and parenchyma.**
- The pericycle is indeed a layer that can contain both sclerenchyma (thick-walled cells) and parenchyma (thin-walled cells). This is a correct statement about the pericycle.
- **Conclusion:** This option is correct.

### Final Answer:
The odd one out is **Option 3**: "The cells of the endodermis have a deposition of water impermeable waxy material called lignin."