MCQOPTIONS
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| 1. |
The motion of air mass in a tornado is |
| A. | free vortex at the centre and forced vortex outside |
| B. | free vortex at the centre as well as outside |
| C. | forced vertex at the centre and free vortex outside |
| D. | forced cortex at the centre as well as outside |
| Answer» E. | |