The boundary between North and South Korea is marked by which one of the following ?

The boundary between North and South Korea is marked by the 38th Parallel (38° N latitude). Following the end of World War II in 1945, the Korean Peninsula was divided along this line into two occupation zones: the northern zone managed by the Soviet Union and the southern zone by the United States [c1][c2][t4]. Although intended as a temporary measure to facilitate the surrender of Japanese forces, the division became permanent with the establishment of separate governments in 1948 [c3][t5]. After the Korean War (1950–1953), the Korean Armistice Agreement established the Military Demarcation Line (MDL) and the Korean Demilitarized Zone (DMZ), which roughly follows the 38th Parallel across the peninsula [t1][t7]. While the modern border (MDL) is a sinuous line based on troop positions at the time of the ceasefire, the 38th Parallel remains the popular and historical name for the demarcation between the two nations [t5][t8].

Sources

1. [1] Contemporary World Politics, Textbook in political science for Class XII (NCERT 2025 ed.) > Chapter 2: Contemporary Centres of Power > South Korea > p. 27
2. [2] History , class XII (Tamilnadu state board 2024 ed.) > Chapter 15: The World after World War II > The Korean War (1950-53) > p. 253
3. [3] Themes in world history, History Class XI (NCERT 2025 ed.) > Chapter 7: Paths to Modernisation > Beginnings of Modernisation > p. 175
4. [4] https://en.wikipedia.org/wiki/Military_Demarcation_Line
5. [5] https://www.britannica.com/place/38th-parallel