The government has merged which of the following DRDO labs to create a new one to do focused research on terrain and avalanches along the borders with China and Pakistan?

• A. Snow and Avalanche Studies Establishment and Delhi-based Defence Terrain Research Establishment
• B. Armament Research & Development Establishment and Advanced Centre for Energetic Materials
• C. Advanced Centre for Energetic Materials and Delhi-based Defence Terrain Research Establishment
• D. Armament Research & Development Establishment and​ Delhi-based Defence Terrain Research Establishment
• E. Aeronautical Development Establishment and Snow and Avalanche Studies Establishment