The first Biosphere Reserve of India established in 1986 is:

Question

Accepted Answer

The correct answer is Option 4: Nilgiri. Here's why:

*   **Nilgiri Biosphere Reserve (Option 4):** The Nilgiri Biosphere Reserve was indeed the first Biosphere Reserve established in India in 1986. This aligns perfectly with the question's premise. It was established to protect the region's rich biodiversity, encompassing parts of Tamil Nadu, Kerala, and Karnataka. Its establishment in 1986 makes it the pioneer in India's Biosphere Reserve program.

Now, let's examine why the other options are incorrect:

*   **Manas (Option 1):** Manas National Park is a UNESCO World Heritage Site and a Project Tiger Reserve located in Assam, India. While it is a significant conservation area, it was not the first Biosphere Reserve established in 1986.

*   **Nanda Devi (Option 2):** Nanda Devi Biosphere Reserve is located in Uttarakhand, India. While it is an important Biosphere Reserve, it was not the first one established in 1986.

*   **Nokrek (Option 3):** Nokrek Biosphere Reserve is located in Meghalaya, India. It is a significant area for biodiversity conservation, but it was not the first Biosphere Reserve established in India in 1986.

Therefore, based on the factual information and the question's premise, Nilgiri (Option 4) is the only correct answer as it was the first Biosphere Reserve established in India in 1986.