Find out incorrect combination w.r.t simple permanent tissue :

Options

A. `{:("Tissue Feature","Cell wall","Function"),("The tissue that forms main component within organs","Cellulosic","Storage"):}`
B. `{:("Tissue Feature","Cell wall","Function"),("Found below the epidermis in dicotyledonous plants ","Cellulose, pectin and hemicellulose","Mechanical support"):}`
C. `{:("Tissue Feature","Cell wall","Function"),("Thick walled, dead elongated and pointed cells","Lignified cell wall","Mechanical support"):}`
D. `{:("Tissue Feature","Cell wall","Function"),("Spherical, oval or cylindrical dead cells","Thick cellulosic cell wall","Flexibility"):}`

Answer

To find the incorrect combination with respect to simple permanent tissues, we need to analyze the characteristics of the three types of simple permanent tissues: parenchyma, collenchyma, and sclerenchyma.

### Step-by-Step Solution:

1. **Identify the Types of Simple Permanent Tissues:**
- The three types of simple permanent tissues in plants are:
- Parenchyma
- Collenchyma
- Sclerenchyma

2. **Analyze Parenchyma:**
- **Characteristics:**
- Cells are isodimetric (similar in size).
- Cell walls are thin and made of cellulose.
- Functions include photosynthesis, storage, and secretion.
- **Conclusion:** This combination is correct.

3. **Analyze Collenchyma:**
- **Characteristics:**
- Located below the epidermis in dicotyledonous plants.
- Cell walls are thickened at the corners and made of cellulose, hemicellulose, and pectin.
- Functions include providing mechanical support.
- **Conclusion:** This combination is correct.

4. **Analyze Sclerenchyma:**
- **Characteristics:**
- Cells are dead, elongated, and pointed.
- Cell walls are thick and lignified.
- Functions include providing mechanical support.
- **Conclusion:** This combination is correct.

5. **Evaluate the Incorrect Combination:**
- **Given Option:** Tissue feature is spherical, oval, or cylindrical dead cells; cell wall is thick cellulosic; and function is flexibility.
- **Analysis:**
- Sclerenchyma cells are dead, but their cell walls are lignified, not thick cellulosic.
- The function of sclerenchyma is mechanical support, not flexibility.
- **Conclusion:** This combination is incorrect.

6. **Final Answer:**
- The incorrect combination is option 4: "Tissue feature is spherical, oval or cylindrical dead cells. Cell wall is thick cellulosic and function is their flexibility."