MCQOPTIONS
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| 1. |
The sky wave propagation is suitable for radio- waves of frequency |
| A. | upto \[2\,MHz\] |
| B. | from \[2\,MHz\] to \[20\,MHz\] |
| C. | from \[2\,MHz\] to \[30\,MHz\] |
| D. | from \[2\,MHz\] to \[50\,MHz\] |
| Answer» D. from \[2\,MHz\] to \[50\,MHz\] | |