Correct Answer: B
Explanation:
Answer options, A and D are grossly incorrect as placing the words, ‘innovates’ and ‘imbibes’ in the blank will create a grammatical as well as a logical error. The word, ‘intoxicates’ is irrelevant with respect to the context in which the word ‘contamination’ is being used. The words, ‘inoculates’ and ‘immunises’ fit in well with the meaning being conveyed by the sentence and hence, B and C are the correct answers.