In which year, did chernobyl disaster happen?

A. 1985
B. 1986
C. 1987
D. 1988

Explanation:

The Chernobyl accident in 1986 was the result of a flawed reactor design that was operated with inadequately trained personnel. The resulting steam explosion and fires released at least 5% of the radioactive reactor core into the environment, with the deposition of radioactive materials in many parts of Europe.