Considering the options:
Focusing on current form and historical achievements, Ravichandran Ashwin is the most likely candidate given his outstanding record and consistent performance in Test cricket.
Conclusion: Ravichandran Ashwin is confirmed as the correct answer, having become the second Indian cricketer to achieve 500 Test wickets in February 2024.
The DDR&D deals with research and development of defence technologies, systems, and equipment. DDR&D stands for: