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प्रश्न
Echoes are not used by:
विकल्प
Geologists
Ultrasonography
Radars
Homogenising milk
MCQ
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उत्तर
Homogenising milk
Explanation:
Echoes are used by geologists for mineral prospecting and in ultrasonography to form images of internal organs. Radar uses reflected radio waves. Echoes are not used for homogenising milk.
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