Direction: In the following passage there are blanks, each of which has been numbered. Choose the correct word from the given options which fits the blank appropriately.

____(1)____ 1986, the explosion and graphite fire at the Chernobyl nuclear reactor in Ukraine resulted in ____(2)____ materials contaminating large tracts of land in multiple countries, as far ____(3)____ as Scotland. In 2011, three reactors at Japan’s Fukushima Daiichi nuclear ____(4)____ melted down again resulting in widespread radioactive ____(5)____.