Which State has announced the development of Fossil Park after the discovery…

The correct answer is Sikkim. In 2023, the Geological Survey of India (GSI) announced the discovery of 1.5 billion-year-old stromatolites in Sikkim, leading to plans for a Fossil Park. Stromatolites are layered sedimentary structures formed by cyanobacteria and represent some of the earliest evidence of life on Earth. This significant paleontological find places Sikkim at the forefront of India's fossil heritage sites.\nNagaland, Arunachal Pradesh, and Meghalaya are known for their geological diversity but have not been associated with this specific 1.5 billion-year-old stromatolite discovery or the subsequent Fossil Park announcement. Therefore, Sikkim is the only state that matches the details provided in the question.