Concept:
Constitutional Amendments allow the Indian Constitution to adapt to changing times. Certain amendments have brought about massive social and political shifts.
Step 1: Matching Education and Voting.
• A. 86th Amendment (2002): A landmark for B.Ed students; it made Elementary Education a Fundamental Right (Article 21A). (A-IV)
• B. 61st Amendment (1989): This democratic reform reduced the voting age from 21 to 18 years. (B-III)
Step 2: Matching Seats and Taxes.
• C. 31st Amendment (1972): This increased the strength of Lok Sabha seats from 525 to 545 to reflect population growth. (C-I)
• D. 100th Amendment (2016): While actually related to the Land Boundary Agreement with Bangladesh, the question uses it here (in some versions mistakenly for the 101st) to represent GST. Within the provided logic of the match, it pairs with GST. (D-II)