Option 1: 1981 - 2011

This option represents a period of recent population growth in India, but it is not the period of steady population growth. During this time, India experienced a rapid increase in population due to various factors such as improvements in healthcare and sanitation, as well as decreasing infant mortality rates.

Option 2: 1951 - 1981

This option represents a period of significant population growth in India, but it is not the period of steady population growth. During this time, India`s population increased at a relatively high rate due to improvements in healthcare, agriculture, and economic development.

Option 3: 1921 - 1951

This option represents the correct period of steady population growth in India. During this time, India`s population grew steadily at a moderate and consistent rate. This period followed a decline in population growth rates in the early 20th century due to factors such as the spread of diseases and famines.

Option 4: 1911 - 1921

This option represents a period of slight population growth in India, but it is not the period of steady population growth. This period followed a decline in population growth rates during the late 19th and early 20th centuries, due to factors