Question

by july of 1950, even with the help of us troops, north korean forces had pushed south korean forces as far south as
seoul
inchon
pyongyang
pusan perimeter

Explanation:

In July 1950, North Korean forces, despite US troop assistance to South Korea, pushed South Korean forces as far south as the Pusan Perimeter. The Pusan Perimeter was a defensive line around the city of Busan (Pusan). Seoul and Incheon are in the northern - central part of the Korean Peninsula. Pyongyang is the capital of North Korea. So the correct answer is related to the southernmost defensive position which is the Pusan Perimeter.

Answer:

D. Pusan Perimeter