MCQOPTIONS
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| 1. |
A tight whirlpool of wind formed in the stratosphere which surrounds Antarctica is called (PTET Feb 2011) |
| A. | polar stratospheric cloud |
| B. | polar vortex |
| C. | Both [a] and [b] |
| D. | Neither [a] nor [b] |
| Answer» C. Both [a] and [b] | |