With reference to Mahatma Gandhi National Rural Employment Guarantee Act, consider the following statements:

1. Every adult household member in a rural area who has a job card is qualified for employment under the scheme.

2. The scheme provides 100 days of guaranteed wage employment in a financial year to adult member volunteers for unskilled manual work.

3. All districts in India are included, with the exception of those where the urban population outnumbers the rural population.

4. The States may make provisions for providing additional days beyond the period guaranteed under the Act.

Which of the statements given above is/are correct?