Which of the following is correct about Strobilanthus kunthiana?

Options

A. It flowers once in 12 years.
B. The plant came to flower last time in September-October 2006.
C. Its mass flowering converted large hilly tracts of Kerala, Karnataka and Tamil Nadu into blue stretches that attracted a large number of tourists
D. AII

Answer

**Step-by-Step Solution:**

1. **Understanding Strobilanthus kunthiana**: This plant is known for its unique flowering cycle, which occurs once every 12 years.

2. **Evaluating the First Statement**: The first statement claims that Strobilanthus kunthiana flowers once in 12 years. This is indeed correct, as the plant has a biennial flowering cycle, with the last flowering occurring in September-October 2006.

3. **Evaluating the Second Statement**: The second statement also mentions that the last flowering occurred in 2006. This is accurate, confirming that the plant's flowering cycle is indeed once every 12 years.

4. **Evaluating the Third Statement**: The third statement discusses the phenomenon of mass flowering, which transforms large hilly areas of Kerala, Karnataka, and Tamil Nadu into stretches of blue due to the flowers of Strobilanthus kunthiana. This is also correct, as the mass flowering attracts many tourists because of the visual spectacle.

5. **Conclusion**: All the statements provided about Strobilanthus kunthiana are correct. Therefore, the correct answer to the question is that all the statements regarding Strobilanthus kunthiana are accurate.

**Final Answer**: All statements about Strobilanthus kunthiana are correct.

---