Explanations:The question asks about the newest neighboring country of India, which is Bangladesh. To understand this, we need to delve into the historical context of the region and the formation of these countries.
India, as a nation, gained independence from British colonial rule on August 15, 1947. At the time of independence, the Indian subcontinent was divided into two separate nations: India and Pakistan. Pakistan was further divided into two parts, West Pakistan (now Pakistan) and East Pakistan (now Bangladesh), separated by India. East Pakistan was geographically and culturally distinct from West Pakistan, leading to significant political and social tensions.
In 1971, East Pakistan declared independence from Pakistan, leading to a war of liberation. With the support of India, East Pakistan successfully seceded from Pakistan and became the independent nation of Bangladesh on December 16, 1971. This event marked the formation of the newest neighboring country of India.
Other neighboring countries of India, such as Afghanistan, Sri Lanka, and Bhutan, had already gained their independence prior to Bangladesh. Afghanistan gained independence from the United Kingdom in 1919, Sri Lanka (then Ceylon) in 1948, and Bhutan became a sovereign nation in 1949 with the signing of the Treaty of Friendship with India.
Understanding the historical context and the sequence of events is crucial to answering this question correctly. The independence of Bangladesh in 1971 is a significant milestone in South Asian history and geopolitics, marking the formation of the newest neighboring country of India.