China is the most populous country in the world with 138 crore people living in the country. India is ranked 2nd with the population of 133 crore people. But China's consistent population control measures have resulted in tremendous control in the population growth.
Although some measures are taken to control the population in India, it didn't reap fruitful effects. The population growth rate continues to be high.
The United Nations says that by 2027 India will become the most populated country in the world. The calculation is done based on projecting the current population growth rate.
The growth rate is particularly high in states like Rajasthan, Uttar Pradesh, Bihar and Madhya Pradesh. However, it is predicted that India's population will start to decline after 2065 due to India's consistent efforts.