IBPS RRBs Officer Scale II and III Sep 2013 Paper

(3)
The meaning of the wordProactive (Adjective) as used in the passage is : controlling a situation by making things happen rather than waiting for things to happen and then reacting to them.
Of the given alternatives, the word Dormant (Adjective) means : not active or growing now.
Hence, the words proactiveand dormant are antonymous.