Convert interrogative sentence into an assertive sentence:
Is there anything special about this bag?
a) There is nothing special about this bag.
b) There is something special about this bag.
c) There is nothing in this bag.
d) No change.

Hint: An interrogative sentence is a sentence that is interrogating, that is, asking a question. An assertive sentence is a sentence that asserts something, that is, states a fact.

Complete step-by-step answer:
The given sentence is enquiring whether there is something special about a particular bag. The asker does not know whether there is something special about it or not. So he is asking about it. To convert it into an assertive sentence, we have to say that there is something special about this bag. Thus, option b is the correct answer.
Option a is wrong because it is in the negative. Usually, such questions do not have answers in the negative. When the author is asking if there is something special about the bag, he is unsure of what the specialty is. It is not a yes-no question.
Option c is wrong because the question is asking about the specialty of the bag and not if there is something in the bag or not. Therefore, the word ‘special’ should be a part of the answer.
Option d is incorrect because an assertive sentence cannot have a question mark. This option is usually given to confuse the students.

Note: Answers to interrogative questions (unless a specific question tag is provided) is usually in the positive. Also, it is very important to add a full stop after the assertive sentence because punctuations are important in this case.