Recently WHO has released postage stamp to mark which Anniversary of Eradication of Small Pox?

Question

Accepted Answer

40. Option C is correct because WHO released a stamp for the 40th Anniversary of Smallpox Eradication. Option A is incorrect as it does not represent the correct anniversary year. Option B is incorrect because it does not match the recognized anniversary period. Option D is incorrect as it does not correspond to the stated event's anniversary.