The correct answer is Option 4.MGNREGA Scheme:The Mahatma Gandhi National Rural Employment Guarantee Act, earlier known as the National Rural Employment Guarantee Act was passed in 2005 to augment employment generation and social security in India.The scheme is a demand-driven wage employment scheme, which functions under the Ministry of Rural Development.Every adult member of a household in a rural area with a job card is eligible for a job under the scheme.The scheme envisages providing 100 days of guaranteed wage employment in a financial year to adult member volunteers for unskilled manual work. Hence, statements 1 and 3 are not correct.It covers all districts of India except the ones with a 100% urban population. This is implemented only in rural areas of India. Hence, Statement 4 is correct.There is also a provision for additional 50 days of unskilled wage employment in drought/natural calamity notified rural areas.As per Section 3(4) of the MGNREGA, the States may make provisions for providing additional days beyond the period guaranteed under the Act from their own funds.Today, women account for 56% of the MGNREGA workers. Unlike minimum wages, under MGNREGA, equal wages are paid to both men and women. Hence, Statement 2 is not correct.