The correct answer is option 3: need for planning.

India is not considered an underdeveloped country because of its need for planning. This means that the country has recognized the importance of strategic planning in its economic, social, and political development. By implementing effective planning strategies, India has been able to address various challenges and work towards achieving its development goals.

Option 1: great dependence on agriculture: While agriculture plays a significant role in India`s economy, it cannot be the sole reason for not being termed as an underdeveloped country. In fact, many developing countries heavily rely on agriculture as a major source of income and employment.

Option 2: rapid population: Rapid population growth is indeed a challenge for India, but it does not solely determine the country`s development status. Many developing countries also face similar population growth rates.

Option 4: slow industrial progress and backward technology: Although the slow industrial progress and backward technology can contribute to development challenges, they are not the primary reasons for India not being termed as an underdeveloped country. India has made significant progress in various industries and has also adopted advanced technologies in sectors such as IT and telecommunications.

In summary, while all the options presented may have some influence on India`s development status, it is the need for