Explanations:The northeastern states of India, including Sikkim, West Bengal, Assam, and Arunachal Pradesh, are geographically significant due to their location and the international borders they share. Understanding these borders is essential for various competitive examinations and general knowledge about the region.
Sikkim, located in the northeastern part of India, shares a border with Bhutan to the south and east, Nepal to the west, and Tibet (China) to the north. West Bengal, while primarily known for its border with Bangladesh, also shares a small border with Bhutan in the northeastern part of the state. Assam, another northeastern state, shares a border with Bhutan to the north and northeast. Arunachal Pradesh, the easternmost state of India, shares a border with Bhutan to the west and south, and with China to the north and east.
Thus, the common frontier shared by Sikkim, West Bengal, Assam, and Arunachal Pradesh is with Bhutan. This geographical fact is important to remember as it reflects the complex geopolitical landscape of the northeastern region of India. The northeastern states are strategically significant due to their proximity to several international borders, which can impact trade, security, and diplomatic relations.
It is important to note that while these states share borders with Bhutan, they also have borders with other countries. For example, Sikkim and Arunachal Pradesh share borders with China, and West Bengal shares a border with Bangladesh. However, the question specifically asks for the common frontier shared by all four states, which is Bhutan.
Understanding the geographical layout of the northeastern states and their international borders is crucial for students preparing for competitive examinations such as the UPSC, SSC, and Bank PO, as well as for general knowledge about the region. This knowledge helps in comprehending the geopolitical dynamics and the strategic importance of these states in the broader context of India's international relations.