Metamorphosis in frog can be accelerated by

Options

A. `l_(2)`
B. P
C. K
D. Ca

Answer

**Step-by-Step Solution:**

1. **Understanding Metamorphosis in Frogs:**
- Metamorphosis is the biological process where a tadpole transforms into an adult frog. This involves significant physical changes, including the shrinking of the tail and the growth of legs.

2. **Identifying the Factors Influencing Metamorphosis:**
- Various factors can influence the rate of metamorphosis in frogs. Among these, hormones play a crucial role.

3. **Role of Thyroid Hormone:**
- The thyroid hormone, specifically thyroxine, is known to accelerate the metamorphosis process. It promotes the growth of legs and the reduction of the tail in tadpoles.

4. **Linking Iodine to Thyroxine:**
- Iodine is essential for the synthesis of thyroxine. Therefore, when tadpoles are treated with iodine, it can lead to an increase in the production of thyroxine, thereby accelerating metamorphosis.

5. **Evaluating the Options:**
- The options given are iodine, phosphorus, potassium, and glycerin. Since iodine is directly linked to the production of thyroxine, which accelerates metamorphosis, it is the correct answer.

6. **Conclusion:**
- Thus, the correct answer to the question "Metamorphosis in frog can be accelerated by" is **iodine** (option 1).