Which of the following pairs of animals has non-glandular skin ?

Options

A. Snake and frog
B. Chameleon and turtle
C. Frog and pigeon
D. Crocodile and tiger

Explanation

To determine which pair of animals has non-glandular skin, we need to analyze the skin characteristics of each pair provided in the options.

### Step-by-Step Solution:

1. **Understand Non-Glandular Skin**: Non-glandular skin refers to skin that does not have any glands, such as oil or mucous glands, which are responsible for producing secretions.

2. **Evaluate Each Option**:
- **Option 1: Snake and Frog**:
- Snakes (Reptilia) have dry, scaly skin that is non-glandular.
- Frogs (Amphibia) have moist skin with mucous glands.
- This pair does not have non-glandular skin.

- **Option 2: Chameleon and Turtle**:
- Chameleons (Reptilia) have dry, scaly skin that is non-glandular.
- Turtles (Reptilia) also have dry, scaly skin that is non-glandular.
- This pair has non-glandular skin.

- **Option 3: Frog and Pigeon**:
- Frogs have moist skin with mucous glands.
- Pigeons (Aves) have feathers and skin with glands (such as uropygial glands).
- This pair does not have non-glandular skin.

- **Option 4: Crocodile and Tiger**:
- Crocodiles (Reptilia) have scaly skin with some glands.
- Tigers (Mammalia) have fur and skin with glands (sebaceous and sweat glands).
- This pair does not have non-glandular skin.

3. **Conclusion**: After evaluating all the options, the only pair that has non-glandular skin is **Option 2: Chameleon and Turtle**.

### Final Answer:
The pair of animals that has non-glandular skin is **Chameleon and Turtle**.