Find out the false statement

Options

A. Aves are cold blooded, egg laying and have four chambered heart
B. Aves have feather covered body, fore limbs are modified as wing and breathe through lungs
C. Most of the mammals are viviparous
D. Fishes, amphibians and reptiles are oviparous

Explanation

To solve the question of identifying the false statement, we will analyze each statement provided in the question step by step.

### Step 1: Analyze the First Statement
The first statement claims that "Aves are cold-blooded, egg-laying and have a four-chambered heart."
- **Cold-blooded**: This is incorrect for Aves (birds) because they are warm-blooded, meaning they can regulate their body temperature.
- **Egg-laying**: This part is correct as birds do lay eggs (they are oviparous).
- **Four-chambered heart**: This is also correct as birds have a well-developed four-chambered heart.

**Conclusion for Step 1**: The first statement is false because it incorrectly categorizes Aves as cold-blooded.

### Step 2: Analyze the Second Statement
The second statement states that "Aves have feathers covered body, forelimbs are modified as wings and breathe through lungs."
- **Feathers covered body**: This is correct; birds have feathers.
- **Forelimbs modified as wings**: This is also correct; birds' forelimbs are adapted as wings.
- **Breathe through lungs**: This is correct; birds use lungs for respiration.

**Conclusion for Step 2**: The second statement is true.

### Step 3: Analyze the Third Statement
The third statement claims that "most of the mammals are viviparous."
- **Viviparous**: This is correct; most mammals give birth to live young rather than laying eggs.

**Conclusion for Step 3**: The third statement is true.

### Step 4: Analyze the Fourth Statement
The fourth statement states that "fishes, amphibians, and reptiles are oviparous."
- **Oviparous**: This is generally correct; most fishes, amphibians, and reptiles lay eggs.

**Conclusion for Step 4**: The fourth statement is true.

### Final Conclusion
After analyzing all the statements, we find that:
- The first statement is false because it incorrectly describes Aves as cold-blooded.
- The second, third, and fourth statements are true.

Thus, the false statement is **Option 1**.

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