Assertion: Pteriodophytes are not completely successful land plants.
Reason: Pteridophytes are dependent on water for thier fertilizations.

Options

A. If both assertion and Reason are true and the reason is a correct explanation of the assertion.
B. If both Assertion and Reason are true but Reason is not a correct explanation of the Assertion.
C. If Assertion is True but the Reason is False.
D. If both Assertion and Reason are False.

Answer

To analyze the assertion and reason provided in the question, we will follow these steps:

### Step 1: Understand the Assertion
The assertion states that "Pteridophytes are not completely successful land plants."
- Pteridophytes are a group of vascular plants that reproduce via spores and do not produce seeds. They include ferns, horsetails, and clubmosses.

### Step 2: Understand the Reason
The reason given is that "Pteridophytes are dependent on water for their fertilization."
- Pteridophytes require water for the sperm to swim to the egg for fertilization, which is a characteristic of their reproductive process.

### Step 3: Analyze the Relationship
Now we need to analyze if the reason correctly explains the assertion:
- The assertion claims that pteridophytes are not completely successful land plants. A key criterion for being considered a "successful land plant" is the ability to reproduce without the need for water. Since pteridophytes do require water for fertilization, this supports the assertion that they are not completely successful as land plants.

### Step 4: Conclusion
Since both the assertion and reason are true, and the reason correctly explains why pteridophytes are not considered completely successful land plants, we conclude:
- The correct answer is option A: Both assertion and reason are true, and the reason is a correct explanation of the assertion.

### Summary:
- Assertion: True (Pteridophytes are not completely successful land plants)
- Reason: True (Pteridophytes depend on water for fertilization)
- Conclusion: Option A is correct.

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