The correct answer is Delhi.

• The Central Soil and Materials Research Station (CSMRS) is located in New Delhi an attached office of the Department of Water Resources, River Development & Ganga Rejuvenation, Ministry of Jal Shakti was established in 1954.
• CSMRS is a certified organization which deals with field and laboratory investigations, basic and applied research, and problems in geotechnical engineering, concrete technology, construction materials, and associated environmental issues.
  • It having a direct bearing on the development of irrigation and power in the country and functions as an adviser and consultant in the above fields to various projects and organizations in India and abroad. 

• CSMRS is to create world-class testing facilities and to provide geotechnical and other services of international standards and support for the planning, design, construction, maintenance, and safety of hydraulic and other civil engineering structures to meet the requirements of clients and stakeholders.
• CSMRS assists with the projects for setting up of the quality control laboratories at the project site and renders its expertise for the quality assurance of the projects. 
• CSMRS activities cover the following: 
  • Soil Mechanics, Soil Dynamics, Rockfill Technology, Geosynthetics for the water resources sector, Chemistry of Impervious Core Materials, Safety, Evaluation of Existing Hydraulic Structures, Subsurface Exploration