The 'Witches broom' of legumes is caused by a

Options

A. Mycoplasma
B. Bacteria
C. Viruses
D. All the above.

Answer

### Step-by-Step Solution:

1. **Understanding the Term "Witch's Broom":**
- Witch's broom is a plant disease characterized by the abnormal growth of shoots, resulting in a dense cluster that resembles a broom.
- This condition typically arises from a single point on the plant.

2. **Identifying the Cause:**
- The disease can be caused by various factors, including stress or pathogens.
- In the context of legumes, the primary cause is often linked to a specific pathogen.

3. **Evaluating the Options:**
- The options given are Mycoplasma, Bacteria, Virus, and "all of the above."
- Mycoplasma is a type of bacteria that lacks a cell wall and is known to cause various plant diseases.

4. **Confirming the Correct Cause:**
- Research and studies indicate that the witch's broom of legumes is specifically caused by Mycoplasma.
- Other pathogens like bacteria and viruses can cause different diseases in plants, but they are not responsible for witch's broom.

5. **Conclusion:**
- Based on the information, the correct answer to the question "The 'Witch's broom' of legumes is caused by a" is **Mycoplasma**.

### Final Answer:
The 'Witch's broom' of legumes is caused by **Mycoplasma**.

---