Blast of Rice is caused by

Options

A. Xanthomonas
B. Pseudomonas
C. Phytophthora
D. Gibberella.

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the organism that causes "blast of rice."

2. **Identifying the Disease**: The blast of rice is a well-known disease that affects rice plants. It is important to recognize the symptoms associated with this disease.

3. **Symptoms of Blast of Rice**: The symptoms include the appearance of brown spots on the leaves of the rice plant, often accompanied by white spots around these brown areas.

4. **Analyzing the Options**: The options provided are:
- A) Xanthomonas
- B) Pseudomonas
- C) Phytophthora
- D) Gibberella

5. **Determining the Causative Agent**: Research and knowledge indicate that the organism responsible for causing the blast of rice is Xanthomonas oryzae.

6. **Selecting the Correct Answer**: Based on the symptoms and the known causative agent, the correct answer to the question is option A) Xanthomonas.

**Final Answer**: The blast of rice is caused by Xanthomonas.

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