Silica incrustation is found on the leaf surface in
(a) Mango
(b) Grasses
(c) Castor
(d) Oleander

Options

A. Mango
B. Grasses
C. Castor
D. Oleaner

Answer

To solve the question regarding silica incrustation found on the leaf surface, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Concept of Silica Incrustation**:
- Silica incrustation refers to the deposition of silica (silicon dioxide) on the surfaces of plant leaves. This can occur in the form of spines or structures known as phytoliths.

2. **Identify the Function of Silica Incrustation**:
- The primary function of silica incrustation is to serve as a defense mechanism against herbivory. It makes the foliage abrasive and often indigestible to herbivores.

3. **Analyze the Options Provided**:
- (a) Mango: Typically does not have silica incrustation.
- (b) Grasses: Known to have silica incrustation in the form of spines and phytoliths.
- (c) Castor: Generally does not exhibit silica incrustation.
- (d) Oleander: Also does not have silica incrustation.

4. **Determine the Correct Answer**:
- Based on the analysis, grasses are the plants that commonly exhibit silica incrustation on their leaf surfaces. Therefore, the correct answer is **(b) Grasses**.

### Final Answer:
The correct option is **(b) Grasses**.

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