Explanations:The Northern plains of India are a significant geographical feature that stretches from the foothills of the Himalayas to the Gangetic delta. This vast alluvial plain is formed by the deposition of silt by three major river systems: the Indus, the Ganga, and the Brahmaputra. The Northern plains are divided into three main sections: the Punjab plains, the Ganga plains, and the Brahmaputra plains.
Among the states located in the Northern plains, Assam is the easternmost state. It is situated in the northeastern part of India and is part of the Brahmaputra plains. The Brahmaputra River, which originates in Tibet, flows through Assam and forms a significant part of the state's geography. The river's alluvial deposits have created a fertile plain that is crucial for agriculture and supports a diverse ecosystem.
It is important to note that while Arunachal Pradesh is the easternmost state in India, it is not part of the Northern plains. Arunachal Pradesh is located in the eastern Himalayan region and is characterized by mountainous terrain rather than the flat alluvial plains. Similarly, West Bengal, although it is located in the eastern part of India and is part of the Northern plains, is not the easternmost state in this region. Assam is further east and thus is the correct answer to the question.
Understanding the geographical layout of the Northern plains and the location of the states within this region is crucial for comprehending the broader geographical context of India. This knowledge is often tested in various competitive examinations, including the UPSC, SSC, and state PSC exams, where candidates are expected to have a clear understanding of the geographical features and the location of states within the country.