Read the following statements about adaptations in desert plants and select the correct ones.
(i) They have a thick cuticle on their leaf surfaces.
(ii) They have stomata present in deep sunken pits.
(iii) They use CAM pathway for photosynthesis.
(iv) They have flattened stems and large sized leaves.
(v) Their stomata remain closed during the day.

Options

A. (i),(ii) and (iii)
B. (ii),(iii) and (v)
C. (i),(ii) and (iv)
D. (i),(ii),(iii) and (v)

Explanation

To solve the question regarding adaptations in desert plants, we will evaluate each statement one by one to determine which ones are correct.

### Step-by-Step Solution:

1. **Statement (i): They have a thick cuticle on their leaf surfaces.**
- **Analysis:** Desert plants have a thick cuticle that helps prevent water loss through evaporation. This is a common adaptation to conserve moisture in arid environments.
- **Conclusion:** This statement is **correct**.

2. **Statement (ii): They have stomata present in deep sunken pits.**
- **Analysis:** Stomata in desert plants are often located in sunken pits to reduce water loss during transpiration. This adaptation helps to minimize exposure to dry air.
- **Conclusion:** This statement is **correct**.

3. **Statement (iii): They use CAM pathway for photosynthesis.**
- **Analysis:** The Crassulacean Acid Metabolism (CAM) pathway is indeed used by many desert plants. This pathway allows them to open their stomata at night to take in CO2, thus reducing water loss during the hot daytime.
- **Conclusion:** This statement is **correct**.

4. **Statement (iv): They have flattened stems and large sized leaves.**
- **Analysis:** In desert plants, leaves are typically reduced to spines to minimize water loss, while stems may be fleshy and green to perform photosynthesis. Large leaves would increase water loss, which is not an adaptation seen in desert plants.
- **Conclusion:** This statement is **incorrect**.

5. **Statement (v): Their stomata remain closed during the day.**
- **Analysis:** Many desert plants, especially those using the CAM pathway, keep their stomata closed during the day to prevent water loss, only opening them at night for gas exchange.
- **Conclusion:** This statement is **correct**.

### Final Evaluation:
The correct statements about adaptations in desert plants are:
- (i) They have a thick cuticle on their leaf surfaces.
- (ii) They have stomata present in deep sunken pits.
- (iii) They use CAM pathway for photosynthesis.
- (v) Their stomata remain closed during the day.

### Summary of Correct Statements:
- Correct statements: (i), (ii), (iii), (v)
- Incorrect statement: (iv)