Which of the following food chains cannot be included in a food web containing the others ?

Options

A. Grass `to` Grasshopper `to` Frog `to` Snake
B. Grains `to` Mouse `to` Snake `to` Peacock
C. Grass `to` Aphid `to` Ladybird beetle `to` Sparrow
D. None of these

Explanation

To determine which food chain cannot be included in a food web containing the others, we need to analyze the given food chains and see how they interconnect.

### Step-by-Step Solution:

1. **Identify the Food Chains**:
The options provided are:
- Food Chain A: Grass → Grasshopper → Frog → Snake
- Food Chain B: Grains → Mouse → Snake → Peacock
- Food Chain C: Grass → Aphid → Ladybird → Beetle → Sparrow

2. **Analyze Interconnections**:
- In Food Chain A, the grasshopper is eaten by the frog, which is then eaten by the snake.
- In Food Chain B, grains are consumed by the mouse, which is then eaten by the snake, and the snake is eaten by the peacock.
- In Food Chain C, grass is consumed by aphids, which are then eaten by ladybirds, which can be eaten by beetles, and finally, sparrows can eat the beetles.

3. **Look for Common Species**:
- The snake appears in both Food Chain A and Food Chain B, indicating a connection.
- The frog from Food Chain A could potentially interact with the ladybird from Food Chain C if we consider the food web concept broadly.
- The grass from Food Chain A and C also shows a connection.

4. **Evaluate Each Chain's Inclusion**:
- All food chains share at least one common species with another chain, suggesting they can be interconnected.
- The only food chain that does not connect with the others through a shared species is the one that involves the ladybird and beetle, as they do not directly relate to the other chains.

5. **Conclusion**:
Since all food chains can be interconnected through shared species, the correct answer is that none of the food chains is excluded from the food web. Therefore, the answer is **none of these**.

### Final Answer:
**None of these**