Arrange the sequence of global events in chronological order.

(A) Chernobyl nuclear disaster in Ukraine, Soviet Union
(B) European migrant crisis
(C) Russia invades Ukraine, leading to a global crisis.
(D) Fall of Saigon, marking the end of the Vietnam War

Choose the correct answer from the options given below:

(D), (A), (B), (C)

The correct answer is Option (4) → (D), (A), (B), (C)

(D) Fall of Saigon: On April 30, 1975, communist forces captured Saigon, effectively ending the Vietnam War and leading to the unification of Vietnam.

(A) Chernobyl nuclear disaster: On April 26, 1986, a catastrophic explosion occurred at the No. 4 reactor of the Chernobyl Nuclear Power Plant in the Ukrainian SSR, Soviet Union.

(B) European migrant crisis: This crisis reached its peak in 2015, characterized by a significant surge of refugees and migrants arriving in Europe, primarily from Syria, Iraq, and Afghanistan.

(C) Russia invades Ukraine: Russia launched a full-scale invasion of Ukraine on February 24, 2022, causing a massive global humanitarian and geopolitical crisis.