If the mouth of frog is kept open for some time, it dies because it is unable to

Options

A. breathe
B. drink water
C. feed
D. utilize excess of air

Answer

To answer the question, "If the mouth of a frog is kept open for some time, it dies because it is unable to...", we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Frog Respiration**: Frogs primarily breathe through their lungs and skin. They utilize a method known as positive pressure breathing, which is different from the negative pressure breathing seen in mammals.

2. **Role of the Mouth in Breathing**: When frogs breathe, they create a pressure difference by manipulating the size of their oral cavity. They take in air through their mouth and then close it to push the air into their lungs.

3. **Effect of Keeping the Mouth Open**: If a frog's mouth is kept open for an extended period, it cannot create the necessary pressure to force air into its lungs. The oral cavity needs to be closed to facilitate this process.

4. **Conclusion**: Therefore, if the mouth of a frog is kept open for some time, it will die because it is unable to breathe.

### Final Answer:
The correct answer is that the frog dies because it is unable to **breathe**.

---