Among the following who are eligible to benefit from the "Mahatma Gandhi National Rural Employment Guarantee Act"?

1. The Mahatma Gandhi National Rural Employment Guarantee Act (MGNREGA) aims to enhance livelihood security in rural areas by guaranteeing at least 100 days of wage employment in a financial year. 2. The core provision of the Act is that it entitles every rural household whose adult members volunteer to do unskilled manual work to receive this guaranteed employment. 3. Eligibility is primarily based on being an adult member of a rural household who demands work. It is a universal guarantee for rural households, not restricted by caste, tribe, poverty status (BPL), or community background. 4. Option (A) is incorrect because eligibility is not limited to scheduled caste and scheduled tribe households. 5. Option (B) is incorrect as the guarantee extends beyond BPL households. 6. Option (C) is incorrect as it is not limited to backward communities. 7. Option (D) correctly states that adult members of any household (in rural areas, willing to do unskilled work) are eligible to benefit.