Match the drainage basins labelled as A, B, C and D with the names listed below and select the correct answer using the codes given below the names of the drainage basins. Names of drainage basins : 1. Ganga-Brahmaputra 2. Indus 3. Parana 4. Zambezi

This question from the IAS 2000 Preliminary Exam requires matching drainage basins with locations on a world map. Based on the original exam map: 'A' corresponds to the Parana basin in South America (3), 'B' to the Ganga-Brahmaputra basin in South Asia (1), 'C' to the Zambezi basin in Africa (4), and 'D' to the Indus basin in South Asia (2). This matching yields the code A-3, B-1, C-4, D-2, which corresponds to Option D.