select the odd one from the following and select the correct option.

Options

A. During the past decade, the temperature of Earth has increased by `0.6.^@C`.
B. Without the greenhouse effect, the average temperature at the surface of Earth would have been `-18.^@C` rather than the present average of `-15.^@C` .
C. The rise in temperature is leading to deleterious change in the environment and resulting in odd. Climatic changes called El Nino effect.
D. More than one option is correct

Answer

To solve the question of selecting the odd one from the given statements, we will analyze each statement step by step.

### Step-by-Step Solution:

1. **Statement A**: "During the past decade, the temperature of Earth has increased by 0.6 degrees Celsius."
- This statement refers to the phenomenon of global warming, indicating that the Earth's temperature has indeed risen over the past decade, which is a widely accepted fact.

2. **Statement B**: "Without the greenhouse effect, the average temperature at the surface of Earth would have been minus 18 degrees Celsius rather than the present day average of minus 16 degrees Celsius."
- This statement discusses the greenhouse effect, stating that it keeps the Earth's surface temperature warmer than it would be without it. However, there is a discrepancy in the temperatures mentioned (minus 18 vs. minus 16 degrees Celsius), as the current average temperature is actually around 15 degrees Celsius, not minus 16. This makes the statement misleading.

3. **Statement C**: "The effect in the temperature is leading to the deleterious change in the environment and resulting in the old climatic changes called the El Niño effect."
- This statement correctly describes the El Niño phenomenon, which is characterized by the abnormal warming of surface ocean waters and its impact on climate patterns. This statement is accurate.

4. **Statement D**: "More than one option is correct."
- This statement suggests that multiple statements from A, B, and C are correct. However, since Statement B contains inaccuracies, this statement is also misleading.

### Conclusion:
After analyzing all the statements, we find that Statement B is the odd one out due to its misleading information regarding the average temperature. Therefore, the correct answer is **Statement B**.