Explanations:The question pertains to the historical administrative divisions of the northeastern states of India, specifically focusing on the region that is now Mizoram. Mizoram, which means "land of the Mizos," is a state in northeastern India. The term "Mizo" refers to the predominant ethnic group in the region, and "Mizoram" is the name given to the state after it achieved statehood in 1987.
Before becoming a state, the region was known as the Lushai Hills District. The term "Lushai" is an older name for the Mizo people, and the Lushai Hills refer to the mountainous region that forms a significant part of Mizoram's geography. The Lushai Hills District was part of Assam until 1972, when it became a Union Territory named Mizoram. It was granted statehood in 1987.
It is important to note that the northeastern states of India, including Mizoram, Meghalaya, and others, have complex histories and administrative divisions. Each state has its own unique ethnic groups and historical contexts. For example, the Khasi Hills, Garo Hills, and Jaintia Hills are all located in Meghalaya, which is a different state from Mizoram. These regions are named after the predominant ethnic groups in those areas: the Khasis, Garos, and Jaintias, respectively.
Understanding the historical names of administrative regions is crucial for students preparing for competitive examinations such as the UPSC, SSC, and State PSC, as these exams often include questions on the geography and history of India's states and Union Territories. The correct answer to this question is that the Mizo Hills District was formerly known as the Lushai Hills District, reflecting the historical administrative division of the region before it became a state.