Which statement is false?

Which statement is false?

• A. The Republic of Korea is the official name of South Korea.
• B. Seoul is the capital of South Korea.
• C. Hallasan is the tallest mountain in Korea.
• D. The Duman River forms a natural border with South Korea.

Answer: (D)

The key idea is geography of Korea’s borders. The Duman (Tumen) River sits in the northeast and forms part of the boundary between North Korea and its northern neighbors, China and (in a small stretch) Russia. It does not border South Korea. South Korea’s land border is with North Korea along the Korean Demilitarized Zone, not a river boundary with another country. So the statement about the Duman River forming a natural border with South Korea is false. For context, the other statements align with common facts: South Korea’s official name is the Republic of Korea, Seoul is its capital, and Hallasan on Jeju Island is the tallest mountain in Korea (within South Korea).

The key idea is geography of Korea’s borders. The Duman (Tumen) River sits in the northeast and forms part of the boundary between North Korea and its northern neighbors, China and (in a small stretch) Russia. It does not border South Korea. South Korea’s land border is with North Korea along the Korean Demilitarized Zone, not a river boundary with another country. So the statement about the Duman River forming a natural border with South Korea is false.

For context, the other statements align with common facts: South Korea’s official name is the Republic of Korea, Seoul is its capital, and Hallasan on Jeju Island is the tallest mountain in Korea (within South Korea).