Which one has the maximum number of chromosomes?

Options

A. Marsilea
B. Equisetum
C. Ophioglossum
D. Lycopodium

Answer

To determine which organism has the maximum number of chromosomes among the given options, we will analyze the chromosome numbers of each option provided.

### Step-by-Step Solution:

1. **Identify the Organisms and Their Chromosome Numbers:**
- **Option A: Marcelli** - The number of chromosomes is 40.
- **Option B: Equisetum** - The number of chromosomes is 260.
- **Option C: Ophiglossum** - The number of chromosomes is 1260.
- **Option D: Lycopodium** - The number of chromosomes is 34.

2. **Compare the Chromosome Numbers:**
- Marcelli: 40
- Equisetum: 260
- Ophiglossum: 1260
- Lycopodium: 34

3. **Determine the Maximum:**
- From the comparison, we can see that Ophiglossum has the highest chromosome number at 1260.

4. **Conclusion:**
- Therefore, the organism with the maximum number of chromosomes is **Ophiglossum** (Option C).

### Final Answer:
The organism with the maximum number of chromosomes is **Ophiglossum**.

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