UPSC 2014 CDS I English Paper

As per the rules of question tags, if the statement is positive then tag will be negative. The subject of the tag will be the pronoun (if the subject is a noun then a suitable pronoun in its place) as used in the statement and the helping verb will also be the same as used in the statement. So, “isn’t she” should be replaced with “doesn’t she”. Thus, option (b) is correct.