Assertion : There is hepatic portal system in frog
Reason : It is venous connection between liver and intestine in frog.

Options

A. If both assertion and reason are true and reason is the correct explanation of assertion
B. If both assertion and reason are true but reason is not the correct explanation of assertion
C. If assertion is true but reason is false
D. If both assertion and reason are false

Explanation

To solve the question regarding the assertion and reason about the hepatic portal system in frogs, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Assertion**: The assertion states that there is a hepatic portal system in frogs. We need to determine if this statement is true or false.
- **Hint**: Recall the anatomical systems in frogs and whether they have a hepatic portal system.

2. **Verifying the Assertion**: The hepatic portal system is indeed present in frogs. It is responsible for transporting blood from the digestive organs to the liver.
- **Hint**: Consider the role of the liver in processing nutrients absorbed from the intestine.

3. **Understanding the Reason**: The reason states that the hepatic portal system is a venous connection between the liver and the intestine in frogs. We need to assess the truth of this statement.
- **Hint**: Think about the function of veins and how they connect different organs.

4. **Verifying the Reason**: The statement is accurate; the hepatic portal vein connects the intestine (and its associated glands) to the liver, allowing for the transport of nutrients and other substances.
- **Hint**: Reflect on how blood flows from the digestive tract to the liver.

5. **Evaluating the Relationship**: Now, we need to determine if the reason correctly explains the assertion. Since the reason describes the function of the hepatic portal system, it does indeed provide a correct explanation for the assertion.
- **Hint**: Analyze if the reason logically supports the assertion.

6. **Conclusion**: Both the assertion and the reason are true, and the reason is the correct explanation of the assertion. Therefore, the answer is that both the assertion and reason are true, and the reason is the correct explanation of the assertion.
- **Hint**: Look for the option that states both are true and that the reason explains the assertion.

### Final Answer:
The correct option is: **If both assertion and reason are true and reason is the correct explanation of assertion.**