The correct answer is option 3, Article 368. Article 368 of the Indian Constitution provides the procedure for amending the Constitution. The process of amendment is an important aspect of the Constitution as it allows for necessary changes and adaptations over time.

Option 1, Article 348, is not the correct answer. Article 348 deals with the language to be used in the Supreme Court and the High Courts.

Option 2, Article 358, is also not the correct answer. Article 358 empowers the President to suspend the enforcement of fundamental rights during the period of a national emergency.

Option 4, Article 378, is also not the correct answer. Article 378 deals with the powers and functions of the Governor of a state.

Therefore, the correct answer is option 3, Article 368, which provides the method of Constitutional Amendment in India.