Name the gland present in skin of frog.

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the name of the gland that is present in the skin of a frog.

2. **Identifying the Characteristics of Frog Skin**: Frog skin is known to be smooth and slippery. This characteristic is important for its survival and function.

3. **Role of Mucus**: The smooth and slippery texture of the frog's skin is due to the presence of mucus. Mucus serves several purposes, including protection and moisture retention.

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