The correct option is B Nanda Devi
Valley of Flowers National Park is an Indian national park, located in North Chamoli, in the state of Uttarakhand and is known for its meadows of endemic alpine flowers and the variety of flora. This richly diverse area is also home to rare and endangered animals, including the Asiatic black bear, snow leopard, musk deer, brown bear, red fox, and blue sheep. Birds found in the park include Himalayan monal pheasant and other high altitude birds. At 3352 to 3658 meters above sea level, the gentle landscape of the Valley of Flowers National Park complements the rugged mountain wilderness of Nanda Devi National Park to the east. Together, they encompass a unique transition zone between the mountain ranges of the Zanskar and the Great Himalaya. The park stretches over an expanse of 87.50 km2 and it is about 8 km long and 2 km wide. Both parks are encompassed in the Nanda Devi Biosphere Reserve (223,674 ha) which is further surrounded by a buffer zone (5,148.57 km2). Nanda Devi National Park Reserve is in the UNESCO World Network of Biosphere Reserves.