The correct option is indeed 1, 2, and 3, as Article 368 of the Constitution of India empowers Parliament to amend the Constitution through addition, variation, or repeal of any provision. This flexibility allows Parliament to respond to evolving societal needs and uphold the principles of democracy, rule of law, and justice. Understanding this process is crucial for UPSC candidates, as it highlights the dynamic nature of constitutional law in India and the balance of power between the legislature and the foundational legal framework.