This is my first attempt on this forum. As far as choosing of more than one topics is concerned, i think every paragraph given in the paper has a single main idea which some times looks diverged in various directions but a candidate is supposed to extract that main idea. Identifying the Topic of a paragraph has 5 marks in this question.To dig out the topic it is suggested to use a green highlighter/marker/pen etc to underline or highlight main ideas so as to know what the single idea concealed in is. Reviewing the paragraph for at least two times make us able to conclude the topic word or sentence.

Thanks.
Riaz