Complete the sentence about Jeongjo of Joseon with the correct year: On 21 February ______, Yi San became the adoptive son of Crown Prince Hyojang and Princess Consort Hyosun by the order of King Yeongjo.

Answer and explanation

Correct answer: B. 1764

On 21 February 1764 Yi San became the adoptive son of Crown Prince Hyojang and Princess Consort Hyosun by King Yeongjo's order. Hyojang was the elder half-brother of his father, Crown Prince Sado.

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