Which Article specifies the procedure for amending the Indian Constitution?

The correct option is Article 368.

Step-by-Step Explanation:

1. Constitutional Amendment Power: The Constitution of India provides a structured mechanism to modify its provisions to adapt to changing circumstances and needs. This amending power is vested in the Parliament of India.

2. Relevant Provisions: Part XX of the Indian Constitution contains only one article, which is Article 368. This article specifically outlines the "Power of Parliament to amend the Constitution and procedure therefor."

3. Types of Amendments: Under Article 368, the Constitution can be amended in two ways:
- By a special majority of Parliament (majority of the total membership of each House and a majority of not less than two-thirds of the members present and voting).
- By a special majority of Parliament along with ratification by the legislatures of at least half of the states (required for amendments affecting the federal structure).

4. Analysis of other options:
- Article 365: Deals with the effect of failure to comply with, or to give effect to, directions given by the Union (related to President's Rule).
- Article 366: Contains definitions of various terms used throughout the Constitution.
- Article 367: Deals with interpretation clauses for interpreting constitutional provisions.

Therefore, Article 368 is the specific article that details the procedure and power for amending the Indian Constitution.