Which of the following articles promotes equal justice and free legal aid for all the citizens?

The correct answer is Directive Principles of State Policy. Part IV of the Constitution, Articles 36 to 51, contains the Directive Principles: the goals the State should pursue in making laws and policies, such as a living wage, free legal aid, village panchayats and a Uniform Civil Code. Article 37 makes them non-justiciable but "fundamental in the governance of the country".

Each wrong option belongs to a different Part. The Fundamental Rights are in Part III, Articles 12 to 35. The Fundamental Duties are in Part IVA, a single Article, 51A, added in 1976. "The Union" is Part V, which begins at Article 52 with the President and covers the Union executive, Parliament and the Supreme Court. Learning the four Parts in a row makes this kind of question easy: Part III rights (12–35), Part IV directives (36–51), Part IVA duties (51A), and Part V the Union (from 52).

The correct answer is Article 37. It says two things at once: the provisions of Part IV "shall not be enforceable by any court", but the principles laid down in it are "nevertheless fundamental in the governance of the country and it shall be the duty of the State to apply these principles in making laws". That is why a citizen cannot sue the government for failing to bring in, say, a Uniform Civil Code, yet courts often rely on the Directive Principles when they judge whether a law is reasonable.

The other options are traps built from nearby numbers. Article 40 is itself a Directive Principle, on organising village panchayats, but it does not state the nature of the whole chapter. Article 30 gives minorities the right to run educational institutions, and Article 35 deals with Parliament's power to make laws giving effect to certain Fundamental Rights; both are in Part III. When a question quotes the words "fundamental in the governance of the country", the answer is always Article 37.

The correct answer is Article 39(d). Article 39 lists several principles the State should direct its policy towards, and clause (d) asks it to secure equal pay for equal work for both men and women. Parliament gave effect to it through the Equal Remuneration Act, 1976, whose provisions are now part of the Code on Wages, 2019, and the Supreme Court has also treated equal pay for equal work as flowing from Articles 14 and 16.

The other options are real Directive Principles on related subjects, which is why they mislead. Article 39(a) is about an adequate means of livelihood for all citizens, men and women equally. Article 42 asks for just and humane conditions of work and maternity relief. Article 43 is about a living wage and a decent standard of life for workers. A good way to separate them: 39(a) livelihood, 39(d) equal pay, 42 working conditions and maternity, 43 living wage.

The correct answer is Organization of village panchayats. Article 40 asks the State to take steps to organise village panchayats and to give them the powers and authority they need to function as units of self-government. It is one of the Gandhian principles, reflecting Gandhi's idea of village self-rule. For decades it remained only a direction, until the 73rd Amendment of 1992 made a three-tier Panchayati Raj system compulsory and added Part IX to the Constitution.

The wrong options borrow from other provisions. Free and compulsory education for children aged six to fourteen is a Fundamental Right under Article 21A, while Article 45 now covers early childhood care below six. Free housing to the poor is not a specific Directive Principle at all. Free medical aid is not named either; public health and nutrition come under Article 47. Remember the link: Article 40 was the seed, and the 73rd Amendment turned it into the Panchayati Raj institutions we have today.

The correct answer is Participation of workers in the management of industries. The 42nd Amendment Act, 1976 inserted Article 43A, which asks the State to take steps, by suitable legislation or in any other way, to secure the participation of workers in the management of undertakings and industrial establishments. The same amendment added Article 39A (free legal aid) and Article 48A (environment) and rewrote Article 39(f) on the healthy development of children.

The three other options are Directive Principles that were in the Constitution from the start, in 1950, which is exactly what makes the question hard. Equal pay for equal work for men and women is Article 39(d). The right to work, to education and to public assistance in unemployment, old age, sickness and disablement is Article 41. A living wage and humane conditions of work are Articles 43 and 42. The quickest check is the letter: the Directive Principles added later carry a letter after the number (39A, 43A, 43B, 48A), while the original ones do not.