Someday computers may be able to "see" forms, just as they now can be

A. that is similar to artificial vision, but the solution has proved easier.
Incorrect. Problem is compared to artificial vision

B. that is similar to artificial vision but one that has proved easier to solve.
Incorrect. Problem is compared to artificial vision.

C. similar to that of artificial vision but it has proved easier to solve.
Incorrect. It doesn't have clear antecedent.

D. similar to that of artificial vision, but the solution has proved easier.
My choice. Avoids antecedent issue, but not sure if "proved easier" is clear. "Proved easier" compared to what? If it's not this choice, then I'd go with E.

E. similar to that of artificial vision but one that has proved easier to solve.
Incorrect. I don't think one has a clear antecedent, but maybe it does since it is modified by to solve which make it somewhat clear it's talking about the problem.

Someday computers may be able to "see" forms, just as they now can be made to recognize voices, a problem of perception that is similar to artificial vision, but the solution has proved easier.

A. that is similar to artificial vision, but the solution has proved easier. Incorrect
B. that is similar to artificial vision but one that has proved easier to solve. Incorrect
C. similar to that of artificial vision but it has proved easier to solve. Incorrect
D. similar to that of artificial vision, but the solution has proved easier. Keeps
E. similar to that of artificial vision but one that has proved easier to solve. Keeps

POE -

A & B - eliminate, comparison error - 'a problem' similar to 'artificial vision'

C - pronoun error, 'it' refers what

between D & E

E - 'one' refers to what?

D - ' the solution' - seems good

D should be answer

Can anyone please tell me that why option C is wrong ?
As 'it' is clearly referring to artificial vision !?
Please correct me if I'm wrong.
Thank you

Hi

Let me try to address your query. Let us plug in option (C) into the original sentence:

Someday computers may be able to "see" forms, just as they now can be made to recognize voices, a problem of perception similar to that of artificial vision but it has proved easier to solve.

The "it" in option (C) can refer to either:

i) artificial vision
ii) problem of perception

Now, ambiguous antecedent, by itself, is always a dicey reason to rule out an answer option. Therefore, we should hold on to this option at this point. However, we can see that option (E) is clearly conveying the intended message and has no problem of any ambiguous pronoun antecedent. Therefore, given the presence of option (E), we should eliminate option (C) and go with (E).

Hope this clarifies.

Hi
You have definitely cleared my confusion but I want to ask that why we have used "...but one that has proved easier to solve." ?

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