2011 की जनगणना के आधिकारिक आंकड़ों के अनुसार, संख्यात्मक रूप से भारत का सबसे बड़ा जनजातीय समुदाय कौन सा है?

Crude birth rate is defined as the number of live births per 1,000 population in:

Many developing countries experience continued population growth despite a decline in fertility rates due to which of the following factors? (a) Increase in life expectancy (b) Increase in infant mortality rate (c) Falling death rate (d) Better living conditions