It was fought on middle of 19th Century between Qing Dynasty and British Empire.
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Mongolian War
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Tibetan War
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Opium War
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Sino-Japanese War
C
Correct answer
Explanation
The Opium Wars (1839-1842 and 1856-1860) were fought between the Qing Dynasty of China and the British Empire in the mid-19th century. They were triggered by trade disputes and opium trafficking. The other options are incorrect: Mongolian and Tibetan Wars don't fit the description, and the Sino-Japanese Wars occurred later (1894-95, 1937-45).