Assertion : Temperature near the sea-coast are moderate.
Reason : Water has a high thermal conductivity.

Options

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

Explanation

To analyze the given assertion and reason, let's break it down step by step:

### Step 1: Understand the Assertion
The assertion states that "Temperature near the sea-coast are moderate." This means that coastal areas experience relatively stable and mild temperatures compared to inland areas.

**Hint:** Consider how the presence of large bodies of water influences temperature changes.

### Step 2: Understand the Reason
The reason provided is that "Water has a high thermal conductivity." Thermal conductivity refers to the ability of a material to conduct heat. Water does indeed have a relatively high thermal conductivity compared to many other substances.

**Hint:** Think about how thermal conductivity affects heat transfer in water and its surroundings.

### Step 3: Analyze the Relationship
While both the assertion and the reason are true, we need to determine if the reason is the correct explanation for the assertion.

- The assertion about moderate temperatures near the coast is primarily due to the specific heat capacity of water, which allows it to absorb and release heat slowly, thus moderating temperature fluctuations.
- The reason given (high thermal conductivity) does not directly explain why temperatures are moderate; instead, it is the high specific heat capacity of water that plays a more significant role in temperature moderation.

**Hint:** Reflect on the difference between thermal conductivity and specific heat capacity, and how each affects temperature regulation.

### Step 4: Conclusion
Since both the assertion and the reason are true, but the reason does not correctly explain the assertion, we conclude that the correct option is that both are true, but the reason is not the correct explanation for the assertion.

**Final Answer:** The correct option is that both the assertion and reason are true, but the reason is not the correct explanation of the assertion.