The Correct Arrangement of the Eastern Hills from North to South

The eastern hills or Purvanchal is a stunning landscape located in the northeast region of India. It is known for its picturesque beauty and diverse flora and fauna. Three famous hill ranges in the Purvanchal region are the Naga Hills, Patkai Bum, and Lushai Hills. To correctly arrange these hills from north to south, we need to consider their geographical locations and understand their positioning in relation to each other.

1. Naga Hills
The Naga Hills is the northernmost hill range among the three mentioned in the question. It is located in the northeastern part of India and extends across the Indian states of Nagaland, Manipur, and Arunachal Pradesh. These hills are an extension of the Himalayan mountain range and serve as the natural boundary between the Indian states and Myanmar. The Naga Hills are known for their rugged terrain, dense forests, and rich biodiversity.

2. Patkai Bum
The Patkai Bum, also known as the Patkai Range, lies south of the Naga Hills. It stretches across the Indian states of Nagaland, Manipur, and Arunachal Pradesh, as well as Myanmar. These hills are part of the larger Patkai Mountain Range, which is an important geological formation in Southeast Asia. The Patkai Bum is characterized by its steep slopes, deep valleys, and dense vegetation. It is home to various tribal communities and harbors a wide range of flora and fauna.

3. Lushai Hills
The Lushai Hills, also called the Mizo Hills, are located south of the Patkai Bum. They are situated in the Indian state of Mizoram and extend into parts of Myanmar and Bangladesh. The Lushai Hills are known for their scenic beauty, with rolling hills, lush green forests, and cascading waterfalls. The region is inhabited by the Mizo people, who have a rich cultural heritage. The Lushai Hills offer breathtaking landscapes and are a popular tourist destination.

Correct Arrangement: 2 1 3 (Patkai Bum, Naga Hills, Lushai Hills)
Based on the geographical positioning of these hill ranges, the correct arrangement from north to south would be Patkai Bum, Naga Hills, and Lushai Hills. Therefore, option 'B' is the correct answer.

The arrangement can be summarized as follows:
1. Patkai Bum: Located south of the Naga Hills, it stretches across Nagaland, Manipur, Arunachal Pradesh, and Myanmar.
2. Naga Hills: Serves as the northernmost hill range, forming a natural boundary between India (Nagaland, Manipur, Arunachal Pradesh) and Myanmar.
3. Lushai Hills: Situated in Mizoram, south of the Patkai Bum, it extends into parts of Myanmar and Bangladesh.