Explanation:

The word 'spurious' means not being what it purports to be; false or fake. In the context of 'spurious charges', it implies that the charges are not genuine or are fabricated. Option B ('bona fide') and C ('authentic') are antonyms of 'spurious'. Option D ('similar') does not capture the meaning of falsehood or illegitimacy. Thus, 'fake' is the most accurate meaning.