अनुसूचित जाती व अनुसूचित जमाती (अत्याचार प्रतिबंध) अधिनियम 1989 च्या कलम 21 नुसार कायद्याची प्रभावी अंमलबजावणी सुनिश्चित करणे, अत्याचार झालेल्या व्यक्तींना सह न्याय मिळवून देण्यासाठी पुरेशी सुविधा पुरविणे हे सरकारचे कर्तव्य असेल.

The correct answer is Option D (All of the above).

Key Points:
• SC & ST (Prevention of Atrocities) Act, 1989 – Section 21:
• Section 21 delineates the "Duty of Government to ensure effective implementation of the Act".
• Section 21(2) specifically lists measures the State Government may take, which explicitly include:
• Provision of adequate facilities, including legal aid, to the victims to enable them to avail justice.
• Travelling and maintenance expenses to witnesses, including the victims, during investigation and trial.
• Economic and social rehabilitation of the victims of atrocities.
• Appointment of officers for initiating or supervising prosecutions, setting up committees, periodic surveys, etc.
• Since all options (1, 2, and 3) are statutory measures prescribed under Section 21(2), Option 4 ('All of the above') is correct.
• Key Takeaway: Section 21 of the Atrocities Act 1989 obligates the government to provide legal aid, travel expenses to witnesses, and rehabilitation to victims.