Explanation:

• In the population history of India, during 1911 - 1921 decade India recorded a negative growth rate of population.

The year 1921 is known as the year demographic divide because it is the only census year when there was a decrease in the growth of population. 

• Due to the occurrence of influenza in 1918, the mortality rate of the country increased and caused 1.4 crore deaths in the country.

• In addition, the occurrence of famine, plague, and malaria also resulted in the decline of the population.

• It registered a negative growth rate of -0.31 percent.

Additional Information

• The period from 1901-1921 is referred to as a period of the stagnant or stationary phase of growth of India's population, since in this period growth rate was very low. The decades 1921-1951 are referred to as the period of steady population growth. ? An overall improvement in health and sanitation throughout the country brought down the mortality rate.

• At the same time, better transport and communication systems improved distribution systems.

• The decades 1951-1981 are referred to as the period of population explosion in India, which was caused by a rapid fall in the mortality rate but a high fertility rate of population in the country.

• In the post-1981 till present, the growth rate of country's population though remained high, has started slowing down gradually.

• As per the estimates of the United Nations, while the population of the world grew at an annual rate of 1.23% in the time period 2000 to 2010, India recorded an annual growth rate of 1.64% during 2001 to 2011. While India’s population growth in the first-half of 20th century grew one and a half times, the growth in the later half was phenomenal with a threefold increase.

Hecne only statement 2nd is correct.