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प्रश्न
Match the following:
| 1. | Wave | a. | Unwanted sound |
| 2. | Sound | b. | Successive reflections |
| 3. | Noise | c. | Movement of disturbance |
| 4. | Thunder | d. | Mechanical wave |
जोड़ियाँ मिलाइएँ
उत्तर
| 1. | Wave | c. | Movement of disturbance |
| 2. | Sound | d. | Mechanical wave |
| 3. | Noise | a. | Unwanted sound |
| 4. | Thunder | b. | Successive reflections |
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