भारतीय राज्यघटनेची नव्याण्णवावी घटनादुरुस्ती, 2014 _______ या बाबीशी संबंधित आहे.

The correct answer is Option D (Appointments of Supreme Court and High Court Judges).

Key Points:
• 99th Constitutional Amendment Act, 2014 & NJAC:
• The 99th Constitutional Amendment Act, 2014 sought to replace the collegium system of appointing judges with the National Judicial Appointments Commission (NJAC).
• It inserted Articles 124A, 124B, and 124C into the Constitution and amended Articles 124(2), 217(1), and 222(1).
• In October 2015, a five-judge Constitution Bench of the Supreme Court (Fourth Judges Case) struck down both the 99th Amendment and the NJAC Act as unconstitutional and void, holding that they violated the independence of the judiciary, which is part of the basic structure.
• Evaluation of Other Options:
• 100th Amendment Act, 2015: Land Boundary Agreement (LBA) with Bangladesh.
• 89th Amendment Act, 2003: Separated NCSC (Art. 338) and NCST (Art. 338A).
• Key Takeaway: 99th Amendment (2014) introduced the National Judicial Appointments Commission (NJAC), which was struck down by the Supreme Court in 2015.