Which one of the following is not a natural polymer

Options

A. ABA
B. Zeatin
C. 2,4-D
D. N6 - furfuryl amino purine

Answer

To determine which of the following options is not a natural polymer, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Definitions**:
- **Natural Polymers**: These are polymers that occur naturally in the environment and can be easily extracted. Examples include cellulose, proteins, and starch.
- **Synthetic Polymers**: These are man-made polymers that are typically derived from petroleum and are created through chemical processes. Examples include nylon, polythene, and polyester.

2. **Analyze the Options**:
- **Option A: Zeatin**: This is a natural cytokinin (a type of plant hormone) and is derived from natural sources. It is considered a natural compound.
- **Option B: 2,4-D**: This is a synthetic herbicide used for weed control. It is not found in nature and is produced artificially.
- **Option C: N6**: This is a type of purine, which is a natural compound found in nucleic acids (DNA and RNA).
- **Option D: Perforine**: This is a protein that is part of the immune response in certain cells, and it is naturally occurring.

3. **Identify the Non-Natural Polymer**:
- Among the options, **2,4-D** stands out as it is a synthetic compound and does not occur naturally. Therefore, it is not a natural polymer.

4. **Conclusion**:
- The correct answer is **Option B: 2,4-D**, as it is not a natural polymer.

### Final Answer:
**Option B: 2,4-D is not a natural polymer.**