The correct answer is option 4: "This is implemented only in rural areas of India."

Explanation:

The National Rural Employment Guarantee Act, 2005, commonly known as NREGA or MGNREGA, is a social welfare measure implemented by the Government of India. It guarantees the right to employment for rural households in India.

Option 1 - Incorrect: The Act does not ensure a specific number of days of employment. It provides a minimum of 100 days of employment in a financial year to each rural household that demands work.

Option 2 - Incorrect: The Act does not provide higher wages to women workers specifically. It ensures equal wages for men and women for the same work.

Option 3 - Incorrect: Although both skilled and unskilled jobs can be provided under NREGA, the Act does not guarantee that people will be given both types of jobs. The type of work provided depends on the demand and availability of work in a particular area.

Option 4 - Correct: The Act is implemented only in rural areas of India. It aims to address the issue of unemployment and poverty in rural areas by providing employment opportunities to rural households. Urban areas have similar employment guarantee schemes, but they fall under different legislations.