Where was the World Stamp Exhibition ‘Philanippon 2021’ held ?

The correct answer is (b). The World Stamp Exhibition ‘Philanippon 2021’ was held in Tokyo, Japan from October 29 to November 5, 2021. It was the 70th World Stamp Exhibition and the first to be held in Japan since 1970. The exhibition featured stamps from around the world, as well as exhibits on the history of Japanese stamps.

(a) China is incorrect because the World Stamp Exhibition ‘Philanippon 2021’ was not held in China.
(c) Germany is incorrect because the World Stamp Exhibition ‘Philanippon 2021’ was not held in Germany.
(d) Taiwan is incorrect because the World Stamp Exhibition ‘Philanippon 2021’ was not held in Taiwan.