This question tests the understanding of the word 'setbacks' in a specific context. 'Setbacks' generally means a delay or a reversal in progress. In the context of an operation being performed by a surgeon, the most logical interpretation is that there were unexpected complications (B). Option A is incorrect because it introduces a financial aspect that is not implied in the sentence. Option C is incorrect because it suggests personal issues of the surgeon, which is not related to the operation's progress. Option D is incorrect because it implies a delay due to administrative reasons, which is not the focus of the sentence.