Assertion : Two kingdom classification was insufficient.
Reason : Majority of organisms did not fall into either of the categories in two kingdom classification.

Options

A. If both assertion and reason and true and reason is the correct explanation of assertion.
B. If both assertion and reason and true and 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

**Step-by-Step Solution:**

1. **Understand the Assertion and Reason:**
- The assertion states that "Two kingdom classification was insufficient."
- The reason provided is that "Majority of organisms did not fall into either of the categories in two kingdom classification."

2. **Analyze the Two Kingdom Classification:**
- The two kingdom classification system categorizes living organisms into two groups: plants and animals.
- This system was developed by Carl Linnaeus and primarily focuses on the mode of nutrition and mobility of organisms.

3. **Identify the Limitations:**
- The two kingdom classification does not account for:
- Unicellular vs. multicellular organisms.
- Eukaryotic vs. prokaryotic organisms.
- Autotrophic (organisms that produce their own food) vs. heterotrophic (organisms that consume other organisms for food) organisms.
- As a result, many organisms, such as bacteria and fungi, do not fit neatly into either category.

4. **Evaluate the Assertion and Reason:**
- Since the assertion is that the two kingdom classification is insufficient, and the reason explains that many organisms do not fit into these categories, both statements are true.
- Furthermore, the reason directly supports the assertion, as it highlights the inadequacy of the classification system.

5. **Conclusion:**
- Therefore, both the assertion and reason are true, and the reason is the correct explanation of the assertion.

**Final Answer:**
Both assertion and reason are true, and the reason is the correct explanation of the assertion.

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