Rana tigrina belongs to the phylum

Options

A. Annelida
B. Arthropoda
C. Mollusca
D. Chordata

Explanation

**Step-by-Step Solution:**

1. **Identify the Scientific Name**: The question refers to "Rana tigrina," which is the scientific name for the Indian bullfrog.

2. **Determine the Classification**: To classify Rana tigrina, we need to know its taxonomic hierarchy. The Indian bullfrog is a type of amphibian.

3. **Phylum Identification**: Amphibians, including frogs, belong to the phylum Chordata. This classification is based on the presence of a notochord during their developmental stages.

4. **Evaluate the Options**: The options provided are:
- a) Annelida
- b) Orthochorda
- c) Mollusca
- d) Chordata

5. **Select the Correct Option**: Since Rana tigrina is classified under the phylum Chordata, the correct answer is option d) Chordata.

**Final Answer**: Rana tigrina belongs to the phylum Chordata.

---