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प्रश्न
Match the following
| 1. | Infrasonic | (a) | Compressions |
| 2. | Echo | (b) | 22 kHz |
| 3. | Ultrasonic | (c) | 10 Hz |
| 4. | High-pressure region | (d) | Ultrasonography |
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उत्तर
| 1. | Infrasonic | (c) | 10 Hz |
| 2. | Echo | (d) | Ultrasonography |
| 3. | Ultrasonic | (b) | 22 kHz |
| 4. | High-pressure region | (a) | Compressions |
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