Which of the following phases is regarded as a phase of negative growth rate of Population in India?

1911-1921

The correct answer is Option 2: 1911-1921

NCERT: 1911-1921: The period from 1901-1921 is referred to as a period of stagnant or stationary phase of growth of India’s population, since in this period growth rate was very low, even recording a negative growth rate during 1911-1921. Both the birth rate and death rate were high keeping the rate of increase low.