The correct option is Similipal - Odisha.
Explanation
Biosphere Reserves are large areas of natural habitat designated for the conservation of biodiversity, sustainable development, and scientific research. They are recognized under the UNESCO Man and the Biosphere (MAB) Programme.
Analysis of Options:
- Nokrek - Assam Incorrect: Nokrek Biosphere Reserve is located in the Garo Hills of Meghalaya, not Assam. It is a hotspot for the Red Panda and is also an important habitat for the Asian Elephant.
- Similipal - Odisha Correct: Similipal Biosphere Reserve is located in the Mayurbhanj district of Odisha. It derives its name from the 'Simul' (red silk cotton) tree. It includes the Similipal Tiger Reserve and was added to the UNESCO World Network of Biosphere Reserves in 2009.
- Dehang Debang - Sikkim Incorrect: Dehang-Debang Biosphere Reserve is located in the state of Arunachal Pradesh. It encompasses parts of the Siang and Dibang Valley districts and is characterized by rich biodiversity of the Eastern Himalayas.
- Cold Desert - Uttarakhand Incorrect: The Cold Desert Biosphere Reserve is located in Himachal Pradesh. It includes the Pin Valley National Park and surroundings (Chandratal and Sarchu). Uttarakhand is home to the Nanda Devi Biosphere Reserve.
Key Takeaway:
Similipal is located in Odisha, Nokrek in Meghalaya, Dehang-Debang in Arunachal Pradesh, and the Cold Desert Biosphere Reserve in Himachal Pradesh.