Correct Answer: Part IV of the Indian Constitution

Solution : The correct option is Part IV of the Indian Constitution.

The directive to provide "equal justice and free legal aid" is found in Article 39A of the Constitution of India. Article 39A is a part of the Directive Principles of State Policy, which are guidelines and principles given to the government to be followed in the administration of the country. This specific directive emphasises ensuring that opportunities for securing justice are not denied to any citizen with any disability.