Tadpole is the larva of :

Options

A. fish
B. frog
C. mosquito
D. butterfly

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the organism that produces tadpoles as larvae.

2. **Identifying the Options**: The options provided are fish, frog, mosquito, and butterfly.

3. **Analyzing Each Option**:
- **Fish**: Fish do have larvae, but they are not called tadpoles; they have different types of larvae depending on the species.
- **Frog**: Frogs are known to have a larval stage called tadpole, which is a key part of their life cycle.
- **Mosquito**: Mosquito larvae are called wrigglers, not tadpoles.
- **Butterfly**: Butterflies have larvae known as caterpillars, not tadpoles.

4. **Conclusion**: Based on the analysis, the correct answer is that tadpole is the larva of the frog.

5. **Final Answer**: The correct option is **B. Frog**.

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