Five-Kingdom classification was proposed by

Options

A. R.H. Whittaker
B. C. Linnaeus
C. A. Roxberg
D. Virchow

Answer

To answer the question "Five-Kingdom classification was proposed by," we can follow these steps:

### Step 1: Understand the Five-Kingdom Classification
The Five-Kingdom classification system categorizes living organisms into five distinct kingdoms:
1. Monera
2. Protista
3. Fungi
4. Plantae
5. Animalia

### Step 2: Identify the Proposer
The question specifically asks who proposed this classification. The primary figure associated with the Five-Kingdom classification is R. H. Whittaker.

### Step 3: Evaluate the Options
Now, let’s evaluate the options provided:
1. R. H. Whittaker - Proposed the Five-Kingdom classification.
2. Carolus Linnaeus - Known for the Two-Kingdom classification (Plantae and Animalia).
3. Alfred Roxburgh - Not associated with classification systems; he studied anatomy.
4. Rudolf Virchow - Known for contributions to cell theory, not classification.

### Step 4: Conclusion
Based on the evaluation, the correct answer is R. H. Whittaker, as he is the one who proposed the Five-Kingdom classification system.

### Final Answer
The Five-Kingdom classification was proposed by **R. H. Whittaker**.

---