Consider the following activities: 1. Spraying pesticides on a crop field 2. Inspecting the craters of active volcanoes 3. Collecting breath samples from spouting whales for DNA analysis At the present level of technology, which of the above activities can be successfully carried out by using drones?
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A hard Science & Technology multiple-choice question from UPSC Prelims 2020. Attempt it above, then check the correct answer and detailed explanation below.
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Correct answer: D. 1, 2 and 3
All three are feasible with current drone technology — pesticide spraying, inspecting active volcano craters, and collecting breath ('blow') samples from whales for DNA analysis.
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