Phylogenetic system of classification was proposed by

Options

A. Hallier
B. Hutchinson
C. Takhtajan
D. All the above.

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the proposal of the phylogenetic system of classification. This system is based on the evolutionary relationships among organisms.

2. **Identifying Key Contributors**: The video mentions several scientists who contributed to the phylogenetic system of classification: A. Hallier, B. Hutcheson, C. Takhtajan, and also mentions Engler and Prantl.

3. **Analyzing the Options**: The options provided are:
- A. Hallier
- B. Hutcheson
- C. Takhtajan
- D. All of the above

4. **Conclusion**: Since the video states that all the mentioned scientists contributed to the phylogenetic system of classification, the correct answer is option D, which states "All of the above."

5. **Final Answer**: The phylogenetic system of classification was proposed by all of the mentioned scientists, thus the answer is D. All of the above.

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