Congress/carrot Grass is

Options

A. Carthamus oxycantha
B. Echinops echinatus
C. Eupatorium odoratum
D. Parthenium hysterophorus.

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks to identify which plant is commonly known as "Congress carrot grass" from the given options.

2. **Analyzing the Options**:
- **Option 1: Carthamus oxycantha** - This plant is native to Europe, North Africa, and parts of Asia, but it is not known as Congress carrot grass.
- **Option 2: Echinops echinatus** - This is a species of globe thistle found in India, Pakistan, and Sri Lanka, and it is not referred to as Congress carrot grass.
- **Option 3: Eupatorium odoratum** - This is a tropical and subtropical flowering shrub, but it is not the plant we are looking for.
- **Option 4: Parthenium hysterophorus** - This is commonly known as Congress carrot grass, also referred to as Santa Maria or white top weed.

3. **Conclusion**: After analyzing all the options, it is clear that the correct answer is **Option 4: Parthenium hysterophorus**.

4. **Final Answer**: Congress carrot grass is **Parthenium hysterophorus**.

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