Assertion : Hydrophily constitues a major mode of pollination in most of the aquatic angiospermous plants.
Reason : Almost all the aquatic dicot and monocot plants require water for the transport of male gametes and for fertilisation.

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 analyze the given assertion and reason, we will follow these steps:

### Step 1: Understand the Assertion
The assertion states that hydrophily is a major mode of pollination in most aquatic angiospermous plants. Hydrophily refers to the transfer of pollen through water.

### Step 2: Evaluate the Reason
The reason provided is that almost all aquatic dicot and monocot plants require water for the transport of male gametes and for fertilization. This implies that water plays a crucial role in the reproductive process of these plants.

### Step 3: Analyze the Validity of the Assertion
While hydrophily does occur in some aquatic plants, it is not the predominant mode of pollination for most aquatic angiosperms. In fact, many aquatic plants rely on other methods such as wind or insect pollination. Therefore, the assertion is not entirely accurate.

### Step 4: Analyze the Validity of the Reason
The reason states that aquatic dicots and monocots require water for the transport of male gametes. This is true, as water is essential for fertilization in many aquatic plants. However, this does not directly support the assertion that hydrophily is the major mode of pollination.

### Step 5: Conclusion
Since the assertion is false and the reason is true but does not explain the assertion, the correct answer is that both the assertion and reason are false.

### Final Answer
Both the assertion and reason are false.

---