Read the following statements and select the correct statements.
(i) DFC begins with dead inorganic matter.
(ii) DFC is the major conduit for energy flow in a terrestrial ecosystem
(ii) GFC of aquatic ecosystem is longer than a terrestrial ecosystem.
(iv) DFC and GFC are completely separate chains.

Options

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

Answer

To solve the question, we need to analyze each statement regarding the Detritus Food Chain (DFC) and Grazing Food Chain (GFC) and determine which ones are correct.

### Step-by-Step Solution:

1. **Statement (i): DFC begins with dead inorganic matter.**
- **Analysis:** The Detritus Food Chain (DFC) actually begins with dead organic matter, not inorganic matter. It consists of decomposing organic materials such as dead plants, animals, and their waste. Therefore, this statement is **incorrect**.

2. **Statement (ii): DFC is the major conduit for energy flow in a terrestrial ecosystem.**
- **Analysis:** The DFC plays a significant role in energy flow within terrestrial ecosystems. It helps recycle nutrients and energy from dead organic matter back into the ecosystem. Hence, this statement is **correct**.

3. **Statement (iii): GFC of aquatic ecosystem is longer than a terrestrial ecosystem.**
- **Analysis:** Food chains, whether grazing or detritus, cannot be indefinitely long due to energy loss at each trophic level. In general, GFCs in aquatic ecosystems are not necessarily longer than those in terrestrial ecosystems. Therefore, this statement is **incorrect**.

4. **Statement (iv): DFC and GFC are completely separate chains.**
- **Analysis:** In reality, DFC and GFC are interconnected. When organisms from the GFC die, they contribute to the DFC. Thus, they are not completely separate but rather part of a food web. Therefore, this statement is **incorrect**.

### Conclusion:
Based on the analysis, the correct statements are:
- Statement (ii) is correct.
- Statements (i), (iii), and (iv) are incorrect.

Thus, the correct answer is that only statement (ii) is correct.

### Final Answer:
**Correct Statements: (ii)**