What is not found in skin of frog ?

Options

A. scales
B. epidermis
C. poison glands
D. mucus glands

Answer

To determine what is not found in the skin of a frog, we can analyze the options provided:

1. **Epidermis**: The skin of a frog contains an epidermis, which is the outermost layer of skin. This layer is important for protection and plays a role in respiration.

2. **Poison Glands**: Frogs have granular or poison glands in their skin. These glands secrete toxins that can deter predators.

3. **Mucus Glands**: Frogs also possess mucus glands in their skin, which help keep the skin moist and facilitate respiration through the skin.

4. **Scales**: Frogs do not have scales on their skin. Unlike reptiles, which have scales, frogs have smooth, moist skin that aids in their respiratory functions.

Based on this analysis, the correct answer to the question "What is not found in the skin of a frog?" is **scales**.

### Step-by-Step Solution:
1. Identify the components of frog skin: epidermis, poison glands, mucus glands.
2. Analyze each option:
- Epidermis: Present in frog skin.
- Poison Glands: Present in frog skin.
- Mucus Glands: Present in frog skin.
- Scales: Absent in frog skin.
3. Conclude that the only option not found in the skin of a frog is **scales**.