The correct answer is option 1, Article 14. Article 14 of the Indian Constitution guarantees to every person equality before the law and equal protection of law within the territory of India. This means that the state cannot deny any individual the right to be treated equally under the law, regardless of their race, religion, caste, sex, or place of birth. It ensures that all citizens have equal rights and opportunities in the eyes of the law. Option 2, Article 19, guarantees certain fundamental rights such as freedom of speech, expression, assembly, and movement. Option 3, Article 21, guarantees the right to life and personal liberty. Option 4, Article 256, concerns the obligations of the states in the Indian Union.