Which among the following has three-chambered heart - Crocodile, Aligator, Naja, chelone?

Explanation

To determine which among the following animals has a three-chambered heart: Crocodile, Alligator, Naja (cobra), or Chelone (turtle), let's analyze each option step by step.

### Step 1: Understand the general characteristics of reptilian hearts
Most reptiles typically have a three-chambered heart, which consists of two atria and one ventricle. This structure allows for some mixing of oxygenated and deoxygenated blood.

**Hint:** Reptiles generally have three-chambered hearts, but there are exceptions.

### Step 2: Examine the heart structure of Crocodiles
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