Option 1 states that Article 30 of the Indian Constitution provides free legal aid and equal justice. This is incorrect. Article 30 deals with the right of minorities to establish and manage educational institutions.
Option 2 suggests that Article 25 provides free legal aid and equal justice. This is incorrect. Article 25 pertains to the freedom of religion.
Option 4 proposes that Article 33-B provides free legal aid and equal justice. This is incorrect. There is no provision called Article 33-B in the Indian Constitution.
The correct answer is option 3. Article 39-A of the Indian Constitution provides free legal aid and equal justice. This article mandates the state to ensure that opportunities for securing justice are not denied to any citizen due to economic or other disabilities. It empowers the state to provide free legal aid to those who cannot afford it.