Which of the following is true? Sound cannot travel through vacuum, Drinking polluted water causes malaria, The instrument used to measure velocity of wind is Barometer, Our eye is very sensitive to blue light
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Answer: Sound cannot travel through vacuum
Explanation
Sound needs a medium (like air, water, or solid) to travel — it cannot propagate in a vacuum.
Other statements are incorrect:
- Polluted water causes cholera, not malaria.
- Anemometer, not barometer, measures wind velocity.
- The human eye is most sensitive to green light, not blue.
