Which one among the following is the main reason behind the launch of…

The correct answer is Option (2) → Improve the quality of life in urban slums

Option (1) To control migration from rural to urban — Incorrect. The mission deals with conditions inside the slums, not with stopping migration.

Option (2) Improve the quality of life in urban slums — Correct. Slums suffer from poor hygiene, lack of drinking water and toilets, open defecation and unregulated drainage, and this filth spreads disease among people who are already poor and undernourished. The Swachh Bharat Mission, part of the urban renewal mission launched by the Government of India, attacks these very conditions: cleaner surroundings and toilets mean less illness, and so a better life in urban slums.

Option (3) To increase the facilities in rural area — Incorrect. It is part of the urban renewal mission, not a rural scheme.

Option (4) Removal of slum from urban area — Incorrect. It makes life in slums better, not removes the slums.