विधान (A): भारतीय राज्यघटनेच्या 368 व्या कलमानुसार घटनादुरुस्तीची प्रक्रिया नमूद करण्यात आली आहे.
कारण (R) : भारतीय राज्यघटनेत घटनादुरुस्तीच्या विविध पद्धती सांगितल्या आहेत.
पर्यायी उत्तरे :

The correct answer is Option B ((A) and (R) is correct. (R) is not the correct explanation of (A)).

Key Points:
• Article 368: Part XX, Article 368 of the Constitution explicitly lays down the power of Parliament to amend the Constitution and the procedure therefor. Statement (A) is correct.
• Methods of Amendment (Reason R): Article 368 outlines two types of majorities (Special Majority, and Special Majority with State Ratification), while some other articles permit amendments by simple majority (outside Article 368 strict procedures). Thus, multiple methods exist, making Reason (R) correct.
• Logical Relationship: While both statements are independently true, the existence of multiple amendment methods is not the core causal explanation explaining *why* Article 368 prescribes the amendment procedure; rather, Article 368 itself classifies these procedures.
• Conclusion: Both (A) and (R) are correct, but (R) is not the correct explanation of (A).
• Key Takeaway: Both Article 368 provisions and the existence of multiple amendment methods are true, but multiple methods do not cause Article 368.