Which of the following bio-engineered bacteria is utilised for cleaning of marine oil slicks ?

Options

A. Escherichia coli
B. Pseudomonas syringae
C. Pseudomonas putida
D. Rhizoctonia solani

Answer

To solve the question regarding which bio-engineered bacteria is utilized for cleaning marine oil slicks, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Question**: The question asks for a specific bio-engineered bacterium that is used to clean oil spills in marine environments.

2. **Identify the Options**: The options provided are:
- A) E. coli
- B) Pseudomonas syringae
- C) Pseudomonas putida
- D) Rhizoctonia solani

3. **Define Bio-engineered Bacteria**: Bio-engineered bacteria are those that have been genetically modified in laboratories to enhance certain traits, such as the ability to degrade pollutants.

4. **Analyze Each Option**:
- **A) E. coli**: While E. coli is a well-known bacterium, it is not typically used for oil spill cleanup.
- **B) Pseudomonas syringae**: This bacterium is more known for its role in plant pathology rather than bioremediation.
- **C) Pseudomonas putida**: This is a well-documented bio-engineered bacterium that has the ability to degrade hydrocarbons, making it suitable for cleaning oil spills.
- **D) Rhizoctonia solani**: This is a fungus and not a bacterium, and it is not used for oil spill cleanup.

5. **Conclusion**: Based on the analysis, the correct answer is **C) Pseudomonas putida**. This bacterium has been specifically engineered for its ability to degrade hydrocarbons and is effective in cleaning marine oil slicks.

### Final Answer:
The bio-engineered bacterium utilized for cleaning marine oil slicks is **C) Pseudomonas putida**.