World's most problematic aquatic weed is

Options

A. Azolla
B. Wolffia
C. Eichornia
D. Trapa

Answer

**Step-by-Step Solution:**

1. **Identify the Question**: The question asks for the world's most problematic aquatic weed.

2. **Consider the Options**: Although the options are not provided, we need to focus on the characteristics of known problematic aquatic weeds.

3. **Research Aquatic Weeds**: Some well-known problematic aquatic weeds include Water Hyacinth, Water Lettuce, and Duckweed. Among these, Water Hyacinth is recognized for its rapid growth and invasive nature.

4. **Focus on Water Hyacinth**: Water Hyacinth (scientific name: Eichhornia crassipes) is a perennial aquatic plant native to South America. It is known for its beautiful flowers but is considered one of the most problematic aquatic weeds worldwide due to its ability to multiply rapidly and cover water bodies, leading to ecological and economic issues.

5. **Conclusion**: Based on the characteristics and impact of the aquatic weeds, the world's most problematic aquatic weed is **Water Hyacinth**.

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