Which of the following statements is incorrect ?

Options

A. indica, tuberosum and leo represent the specific epithets.
B. Physalia, Apis and Helianthus represent the generic epithets.
C. Monocotyledonae and Dicotyledonae are the two classes of division Angiospermae.
D. Phylum Chordata is the largest phylum of kingdom Animalia.

Explanation

To determine which of the following statements is incorrect, we will analyze each option step by step.

### Step 1: Analyze Option 1
The first option states that "indica, tuberosum, and leo represent the specific epithets."
- **Explanation**: In biological nomenclature, the specific epithet is the second part of the species name. For example, in *Mangifera indica*, *indica* is the specific epithet; in *Solanum tuberosum*, *tuberosum* is the specific epithet; and in *Panthera leo*, *leo* is the specific epithet.
- **Conclusion**: This statement is correct.

### Step 2: Analyze Option 2
The second option states that "Physalia, Apis, and Helianthus represent the generic epithets."
- **Explanation**: The generic epithet is the first part of the species name. *Physalia* (Portuguese man-of-war), *Apis* (honey bees), and *Helianthus* (sunflower) are all genera.
- **Conclusion**: This statement is also correct.

### Step 3: Analyze Option 3
The third option states that "monocotyledon and dicotyledon are the two classes of division angiosperm."
- **Explanation**: Monocotyledons (monocots) and dicotyledons (dicots) are indeed two major groups within the angiosperms, classified based on the number of cotyledons in the seeds.
- **Conclusion**: This statement is correct.

### Step 4: Analyze Option 4
The fourth option states that "phylum Chordata is the largest phylum of kingdom Animalia."
- **Explanation**: This statement is incorrect. The largest phylum in the kingdom Animalia is actually Phylum Arthropoda, which includes insects, arachnids, and crustaceans. Phylum Chordata, which includes vertebrates, is not the largest.
- **Conclusion**: This statement is incorrect.

### Final Conclusion
The incorrect statement is from Option 4: "Phylum Chordata is the largest phylum of kingdom Animalia."

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