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| Q.18 | Researchers from which institute built a portable desalination unit that generates clear, clean drinking water without the need for filters or high-pressure pumps in April 2022? | |
| Ans | 1. Delft University of Technology, Netherlands | |
| 2. The Hong Kong University of Science and Technology, Hong Kong | ||
| 3. Nanyang Technological University, Singapore | ||
| 4. Massachusetts Institute of Technology, USA |
Correct Ans: 4
