Critical Reasoning

Which of the following most logically completes the passage?
Appendicitis (inflammation of the appendix) is potentially fatal; consequently, patients with symptoms strongly suggesting appendicitis almost always have their appendix removed. The appropriate surgery is low-risk but performed unnecessarily in about 20 percent of all cases. A newly developed internal scan for appendicitis is highly accurate, producing two misdiagnoses for every 98 correct diagnoses. Clearly, using this test, doctors can largely avoid unnecessary removals of the appendix without, however, performing any fewer necessary ones than before, since ____________.

A. the patients who are correctly diagnosed with this test as not having appendicitis invariably have medical conditions that are much less serious than appendicitis
B. the misdiagnoses produced by this test are always instances of attributing appendicitis to someone who does not, in fact, have it
C. all of the patients who are diagnosed with this test as having appendicitis do, in fact, have appendicitis
D. every patient who is diagnosed with this test as having appendicitis has more than one of the symptoms generally associated with appendicitis
E. the only patients who are misdiagnosed using this test are patients who lack one or more of the symptoms that are generally associated with appendicitis

[spoiler]OA: Will be posted later. Please justify your choice[/spoiler]

aspirant2011 wrote:Which of the following most logically completes the passage?
Appendicitis (inflammation of the appendix) is potentially fatal; consequently, patients with symptoms strongly suggesting appendicitis almost always have their appendix removed. The appropriate surgery is low-risk but performed unnecessarily in about 20 percent of all cases. A newly developed internal scan for appendicitis is highly accurate, producing two misdiagnoses for every 98 correct diagnoses. Clearly, using this test, doctors can largely avoid unnecessary removals of the appendix without, however, performing any fewer necessary ones than before, since ____________.

A. the patients who are correctly diagnosed with this test as not having appendicitis invariably have medical conditions that are much less serious than appendicitis
B. the misdiagnoses produced by this test are always instances of attributing appendicitis to someone who does not, in fact, have it
C. all of the patients who are diagnosed with this test as having appendicitis do, in fact, have appendicitis
D. every patient who is diagnosed with this test as having appendicitis has more than one of the symptoms generally associated with appendicitis
E. the only patients who are misdiagnosed using this test are patients who lack one or more of the symptoms that are generally associated with appendicitis

[spoiler]OA: Will be posted later. Please justify your choice[/spoiler]

IMO C

Conclusion: using this test, doctors can largely avoid unnecessary removals of the appendix without, however, performing any fewer necessary ones than before since.....

Inference: Using this test if doctors are able to 'largely avoid unnecessary removal' that mean all the diagnose, which this test say +ve are the ones that indeed require removal.
I think C say the same.
Correct me if i am wrong.

i ll opt : A.

Please provide correct answer along with the explanation.

guys OA is B

I too opted for A.
explanation pls.

For me it was between B and C, and I chose B. If the doctors are performing ALL the necessary procedures without performing any fewer procedures, so the ones they are not performing are in fact those that should not have been performed in the first place.
Hope this helps!

aspirant2011 wrote:guys OA is B

you can find a good discussion on this question here >>
https://www.beatthegmat.com/appendicitis-t41855-15.html