Before this year both death rates and birth rates were high in India, whereas, after this transitional moment the death rates fell sharply but the birth rate only fell slightly.  Identify this year.

1931

The correct answer is Option 2: 1931

NCERT: "Before 1931, both death rates and birth rates were high, whereas, after this transitional moment the death rates fell sharply but the birth rate only fell slightly.  "