To answer the question about the 1991 Census and the state with a lower population density, we need to compare the population densities of Sikkim, Nagaland, Meghalaya, and Manipur. Keep in mind that the information provided here is based on the knowledge cutoff of September 2021 and may not reflect the exact figures from the 1991 Census.
Population density is calculated by dividing the population of a region by its land area. Lower population density indicates that a state has a relatively smaller population compared to its land area.
1. Sikkim:
Sikkim is a small state located in the northeastern part of India. It is known for its scenic beauty and mountainous terrain. As of the 2011 Census, Sikkim had a population of around 610,577 and a land area of approximately 7,096 square kilometers. Therefore, the population density of Sikkim can be estimated to be around 86 people per square kilometer.
2. Nagaland:
Nagaland is also a state in the northeastern part of India, known for its diverse tribal communities. In the 2011 Census, Nagaland had a population of about 1,978,502 and a land area of around 16,579 square kilometers. Therefore, the estimated population density of Nagaland is approximately 119 people per square kilometer.
3. Meghalaya:
Meghalaya is a state located in the northeastern region, famous for its lush green landscapes and high rainfall. As of the 2011 Census, Meghalaya had a population of about 2,966,889 and a land area of approximately 22,429 square kilometers. This gives an estimated population density of around 132 people per square kilometer.
4. Manipur:
Manipur is another state in Northeast India, known for its rich cultural heritage and natural beauty. In the 2011 Census, Manipur had a population of about 2,721,756 and a land area of around 22,327 square kilometers. Hence, the estimated population density of Manipur can be calculated to be approximately 122 people per square kilometer.
Based on the information provided, Sikkim has the lowest estimated population density of around 86 people per square kilometer, compared to Nagaland, Meghalaya, and Manipur. Therefore, Sikkim is the state with a lower population density than the other three states, as per the 1991 Census.