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प्रश्न
Arrange the worldwide means of communication given below in the timeline provided. Share your answers with your classmates and teacher.
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| 1. telephone | 2. email | 3. postcard |
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| 4. telegraph | 5. mobile phone | 6. carrier pigeons |
सारिणी
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उत्तर
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| 1. carrier pigeons | 2. telegraph | 3. postcard |
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| 4. telephone | 5. mobile phone | 6. email |
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