The location of the space organisation units have been marked in the given map as 1, 2, 3 and 4. Match these units with the list given and select the correct answer using the codes given below the Lists: A. ISRO B. IIRS C. NRSA D. SAC Codes:

Matching the marked locations (1, 2, 3, 4 on a map - map not provided, analysis based on standard locations of ISRO units) with the space organisation units: Assuming standard prominent ISRO locations geographically represented: - Location 4 likely represents ISRO Headquarters / ISAC / ISTRAC in Bengaluru (Bangalore). Match: 4-A (ISRO - broadly representing key centers). - Location 1 likely represents Satish Dhawan Space Centre (SDSC) SHAR, Sriharikota, or possibly VSSC Thiruvananthapuram. Let's assume Sriharikota for launch focus often highlighted. Alternatively, if 1 is Ahmedabad, it's SAC. - Location 2 likely represents NRSA (National Remote Sensing Agency, now NRSC - National Remote Sensing Centre) in Shadnagar/Hyderabad. Match: 2-C. - Location 3 likely represents IIRS (Indian Institute of Remote Sensing) in Dehradun. Match: 3-B. - Location 1 must then represent SAC (Space Applications Centre) in Ahmedabad. Match: 1-D. Therefore, the matching is 1-D (SAC), 2-C (NRSA), 3-B (IIRS), 4-A (ISRO HQ/major center). Note: Interpretation depends heavily on the map visualization which is absent.