Match list-I with list-II and select the correct answer using the codes given below the lists
`{:(,"List-I",,"List-II"),("A.","Ecotone",1.,"Running water"),("B.","Benthic",2.,"Replacement of one community by another"),("C.","Sere",3.,"Transitional zone between two communities"),("D.","Lotic",4.,"Zone found at the bottom of the sea"):}`

Options

A. `{:("A","B","C","D"),(3,4,2,1):}`
B. `{:("A","B","C","D"),(4,3,2,1):}`
C. `{:("A","B","C","D"),(3,4,1,2):}`
D. `{:("A","B","C","D"),(4,3,1,2):}`

Answer

To solve the matching question between List-I and List-II, we will analyze each term from List-I and find its corresponding term in List-II.

### Step-by-Step Solution:

1. **Identify Ecotone:**
- Ecotone refers to a transitional zone between two different ecological communities. It is where two ecosystems meet and integrate.
- **Match:** Ecotone → Transitional zone between two communities (Option 3).

2. **Identify Benthic:**
- The Benthic zone is the ecological region at the lowest level of a body of water, including the sediment surface and sub-surface layers. It is often referred to as the bottom zone of oceans, seas, and lakes.
- **Match:** Benthic → Zone found at the bottom of the sea (Option 4).

3. **Identify Sere:**
- A Sere is a series of ecological communities that successively replace one another over time, known as ecological succession. It describes the process of change in the species structure of an ecological community.
- **Match:** Sere → Replacement of one community by another (Option 2).

4. **Identify Lotic:**
- Lotic refers to flowing water ecosystems, such as rivers and streams. The term is often used to describe habitats characterized by running water.
- **Match:** Lotic → Running water (Option 1).

### Final Matches:
- A (Ecotone) → 3 (Transitional zone between two communities)
- B (Benthic) → 4 (Zone found at the bottom of the sea)
- C (Sere) → 2 (Replacement of one community by another)
- D (Lotic) → 1 (Running water)

### Summary of Matches:
- A → 3
- B → 4
- C → 2
- D → 1

### Answer Code:
Using the codes given below the lists, the correct answer is:
- A → 3
- B → 4
- C → 2
- D → 1