Explanation: The 2011 Census of India is a comprehensive survey that provides detailed information on various demographic and socio-economic aspects of the country. One of the key areas covered by the census is migration, which includes both internal and international movements of people. Migration patterns are crucial for understanding population dynamics, labor market trends, and regional development.
In the context of Uttar Pradesh and Bihar, these two states have historically been significant sources of out-migration. The reasons for this migration are multifaceted and include economic factors such as the search for better employment opportunities, higher wages, and improved living conditions. Additionally, social factors such as family reunification and educational opportunities also play a role in migration decisions.
The 2011 Census data specifically highlights that 20.9 million people migrated outside their home states from Uttar Pradesh and Bihar. This figure underscores the scale of migration from these states and its impact on both the source and destination regions. Understanding this data is essential for policymakers, planners, and researchers to address issues related to labor markets, urbanization, and regional development.
It is important to note that migration patterns can vary over time due to changes in economic conditions, government policies, and other socio-economic factors. Therefore, the data from the 2011 Census provides a snapshot of the migration situation at that time and should be considered in the context of broader trends and changes.
In summary, the correct answer is 20.9 million, reflecting the significant out-migration from Uttar Pradesh and Bihar as recorded in the 2011 Census. This data is crucial for understanding the demographic and socio-economic dynamics of these states and their impact on the broader national context.