The worst-case scenario at a nuclear power occurred at which of the following places? (1) three mile island (2) chernobyl (3) hiroshima (4) temelin

The answer is: 2. Chernobyl

In 1986, a nuclear reactor was exploded in the city of Chernobyl (located north of Kiev, Ukraine).

The largest damage is not caused by the explosion itself.  The explosion caused a nuclear leakage that make the whole city become contaminated. It is predicted that the contamination would stay above dangerous level until 2040.