Which of the following is the correct matching of an animal, its characteristics and taxon?

Options

A. Animal-Chameleon, Characteristics-prehensile tail, dicondylic skull, camouflaging, Taxon-Reptilia
B. Animal-Monotremes, Characteristics-Viviparous, hair, external ears of pinnae, Taxon-Mammalia
C. Animal-Rana tigrina, Characteristics- No exoskeletal elements, dicondylic skull, eyes have eyelids, Taxon-Amphibia
D. Animal-Scoliodon, Characteristics-Placoid scales, viviparous, external fertilization, Taxon-chondrichthyes

Answer

To determine the correct matching of an animal, its characteristics, and taxon, we will analyze each option provided in the question step by step.

### Step 1: Analyze the First Option - Chameleon
- **Animal**: Chameleon
- **Taxon**: Reptilia (Correct)
- **Characteristics**:
- Prehensile tail (Correct)
- Dicondylic skull (Incorrect - Chameleons have a monocondylic skull)

**Conclusion**: The first option is incorrect due to the dicondylic skull characteristic.

### Step 2: Analyze the Second Option - Monotremes
- **Animal**: Monotremes
- **Taxon**: Mammalia (Correct)
- **Characteristics**:
- Viviparous (Incorrect - Monotremes lay eggs)
- Hair (Incorrect - Monotremes do not have hair; they have a leathery skin)
- External ears of pinna (Incorrect - Monotremes do not have external ears)

**Conclusion**: The second option is incorrect due to all three characteristics being wrong.

### Step 3: Analyze the Third Option - Rana Tigrina
- **Animal**: Rana tigrina (Indian tree frog)
- **Taxon**: Amphibia (Correct)
- **Characteristics**:
- No exoskeletal elements (Correct - Frogs have skin for respiration)
- Dicondylic skull (Correct - Amphibians have two occipital condyles)
- Eyes have eyelids (Correct - Amphibians have eyelids and a nictitating membrane)

**Conclusion**: The third option is correct as all characteristics match the taxon.

### Step 4: Analyze the Fourth Option - Scoliodon
- **Animal**: Scoliodon (Shark)
- **Taxon**: Chondrichthyes (Correct)
- **Characteristics**:
- Placoid scales (Correct - Sharks have placoid scales)
- Viviparous (Correct - Some sharks are viviparous)
- External fertilization (Incorrect - Sharks have internal fertilization)

**Conclusion**: The fourth option is incorrect due to the external fertilization characteristic.

### Final Conclusion
The only correct matching of an animal, its characteristics, and taxon is the third option, which is Rana tigrina (Indian tree frog) under Amphibia with all characteristics being correct.