In each segment, exoskeleton have hardened plates called sclerites
`{:("a) Dorsal sclerite","1) Sternum"),("b) Ventral sclerite","2) Pleura"),("c) Lateral sclerite","3) Tergum"),("d) Sclerite present in","4) Pronotum"),(" protharx",),(,"5) Metanotum "):}`

Options

A. a-1,b-2, c-3, d-4
B. a-3, b-2, c-3, d-4
C. a-3, b-1, c-2, d-4
D. a-3, b-2, c-1, d-5

Answer

To solve the question regarding the matching of sclerites in the exoskeleton of an organism, we will follow these steps:

### Step-by-Step Solution:

1. **Understand the Structure**: The question mentions that in each segment of the exoskeleton, there are hardened plates called sclerites. We need to match the types of sclerites with their corresponding names.

2. **Identify Dorsal Sclerite**: The dorsal sclerite is located on the upper side of the organism. In insects like cockroaches, this part is referred to as the **tergum**.
- **Match**: Dorsal sclerite → Tergum (3)

3. **Identify Ventral Sclerite**: The ventral sclerite is located on the underside of the organism. This part is known as the **sternum**.
- **Match**: Ventral sclerite → Sternum (1)

4. **Identify Lateral Sclerite**: The lateral sclerites are found on the sides of the organism. These are referred to as **pleura**.
- **Match**: Lateral sclerite → Pleura (2)

5. **Identify Sclerite in Prothorax**: The sclerite present in the prothorax is known as the **pronotum**.
- **Match**: Sclerite in prothorax → Pronotum (4)

6. **Compile the Matches**: Now we can compile the matches:
- a) Dorsal sclerite → 3 (Tergum)
- b) Ventral sclerite → 1 (Sternum)
- c) Lateral sclerite → 2 (Pleura)
- d) Sclerite present in prothorax → 4 (Pronotum)

7. **Final Sequence**: The correct sequence of matches is:
- a) 3
- b) 1
- c) 2
- d) 4

### Final Answer:
The correct sequence is:
- a) 3 (Tergum)
- b) 1 (Sternum)
- c) 2 (Pleura)
- d) 4 (Pronotum)