The correct answer is option 2, Article 16. Article 16 of the Indian Constitution enables the Central Government to provide reservations in jobs and educational institutions for the weaker sections of society. This provision ensures that individuals from socially and educationally backward classes, Scheduled Castes, and Scheduled Tribes have equal opportunities in employment and education. Article 16 prohibits discrimination on grounds of religion, race, caste, sex, descent, place of birth, or residence. It guarantees equality of opportunity in matters of public employment and allows the state to make provisions for reservation of appointments or posts in favor of any backward class of citizens, which may be considered necessary for their adequate representation. Therefore, Article 16 plays a critical role in promoting social justice and inclusion in India.