Q. Consider the following activities:
- Spraying pesticides on a crop field.
- Inspecting the craters of active volcanoes.
- 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?
(a) 1 and 2 only
(b) 2 and 3 only
(c) 1 and 3 only
(d) 1, 2 and 3