Part IV of the Constitution of India does NOT explicitly expect the State to secure:

maternity leave for employed women

The correct answer is Option 4 - maternity leave for employed women

Part IV of the Constitution of India (Article 36–51) contains the Directive Principles of State Policy (DPSP). These principles aim at ensuring socio-economic justice to the people and establishing India as a Welfare State. The following are the part of DPSP:

• Right to adequate means of livelihood for all citizens
• Prevention of concentration of wealth and means of production
• Equal pay for equal work for men and women

Maternity leave for employed women is not a part of DPSP.