A weed belonging to family Asteraceae which has spread in all parts of India is

Options

A. Nicotiana
B. Oryza
C. Parthenium
D. Hordeum.

Answer

To solve the question regarding a weed belonging to the family Asteraceae that has spread in all parts of India, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Family**: The question specifies the family Asteraceae. This family is commonly known as the daisy or sunflower family, which includes a variety of flowering plants.

2. **Consider the Options**: The options provided include:
- Nicotiana (Tobacco)
- Oryza (Rice)
- Parthenium
- Hordeum (Barley)

3. **Analyze Each Option**:
- **Nicotiana**: This is the genus for tobacco plants, which belong to the family Solanaceae. Therefore, it is not a member of the Asteraceae family.
- **Oryza**: This refers to rice (Oryza sativa), which belongs to the grass family (Poaceae). Thus, it is also not a member of Asteraceae.
- **Parthenium**: This is known as Congress grass or gajar grass. It is indeed a weed and belongs to the Asteraceae family. It has spread widely in India and is known to cause allergies.
- **Hordeum**: This refers to barley, which also belongs to the grass family (Poaceae). Hence, it is not part of the Asteraceae family.

4. **Select the Correct Answer**: Based on the analysis, the only option that fits the criteria of being a weed from the Asteraceae family that has spread throughout India is **Parthenium**.

### Final Answer:
The weed belonging to the family Asteraceae which has spread in all parts of India is **Parthenium**.

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