What was the former name of Korea when both countries were united?

Here is the question :

WHAT WAS THE FORMER NAME OF KOREA WHEN BOTH COUNTRIES WERE UNITED?

Here is the option for the question :

• Choson
• Persia
• Formosa
• Nihon

The Answer:

And, the answer for the the question is :

Explanation:

[STC007853]. The Korean Peninsula was a single kingdom known as Choson (sometimes spelled Joseon), named after the influential Choson dynasty, for a very long time before North and South Korea were separated. This Korean imperial family ruled for the longest, from 1392 to 1910. Hanyang, or what is now Seoul, was the kingdom’s center.