MCQOPTIONS
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| 1. |
The World Health Organization (WHO) and the UN's postal agency have released a commemorative postage stamp on 9 May to commemorate which anniversary of the eradication of smallpox? |
| A. | 30th |
| B. | 40th |
| C. | 20th |
| D. | 10th |
| Answer» C. 20th | |