Answer : 1. "राज्य के नीति निर्देशक सिद्धांत"
Explanation :

1. Welfare state is a concept of government in which the state plays a vital role in protecting and promoting the economic and social well-being of its citizens.

2. Part IV of the Indian Constitution deals with the Directive Principles of State Policy.

3. The Directive Principles of State Policy constitute a comprehensive socio-economic program for a modern democratic state.