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wunstepcloser
Joined: 04 Oct 2018
Last visit: 22 May 2022
Posts: 3
Given Kudos: 35
Location: United States
Schools: Wharton '21
GPA: 3.91
14 Nov 2018, 16:41
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E
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
95%
(hard)
Question Stats:
29% (01:31) correct
71%
(01:29)
wrong
based on 715
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Unlike many other gemstone varieties, natural and synthetic corundums are incredibly easy to discriminate between.
A Unlike many other gemstone varieties, natural and synthetic corundums are incredibly easy to discriminate between.
B Unlike many other gemstone varieties, the origin of corundums is incredibly easy to identify.
C Unlike those in many other gemstone varieties, natural and synthetic corundums are incredibly easy to identify.
D It is incredibly easy, unlike in many other gemstone varieties, to discriminate between natural and synthetic corundums.
E Corundums are unlike many other gemstone varieties in that it is incredibly easy to discriminate between natural and synthetic ones.
Source: PrepScholar
A Unlike many other gemstone varieties, natural and synthetic corundums are incredibly easy to discriminate between.
B Unlike many other gemstone varieties, the origin of corundums is incredibly easy to identify.
C Unlike those in many other gemstone varieties, natural and synthetic corundums are incredibly easy to identify.
D It is incredibly easy, unlike in many other gemstone varieties, to discriminate between natural and synthetic corundums.
E Corundums are unlike many other gemstone varieties in that it is incredibly easy to discriminate between natural and synthetic ones.
Source: PrepScholar
14 Nov 2018, 21:07
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wunstepcloser
Idiom: Unlike X, Y
Meaning: Gemstones can be both natural and synthetic. In many gemstone varieties, it is hard to tell the difference between
natural and synthetic stones. By contrast, it is easy to tell the difference between natural and synthetic corundums (a kind of gemstone).
Split #1: Items being compared must be parallel
Option B compares [gemstone] varieties to [a gemstone's] origin
B compares a noun to a noun, but they do not have the same kind of content.
One means "different kinds" and the other refers to whether the gemstones are "manufactured or mined."
Option C compares those [what? something present IN other gemstones] to corundums
C compares a pronoun (without an antecedent) to a noun
Option D, if it can be described as a comparison, compares a mysterious and unstated something IN to the verb "to discriminate"
D compares a preposition to an infinitive (and the infinitive should be a participle)
Eliminate B, C, and D
Split #2: Certain prepositions should almost never be placed at the end of sentences. High on the list is "between."
The GMAT does not forbid sentences that end in prepositions. Even so, "between" is jarring.
Option A says: ...natural and synthetic corundums are incredibly easy to discriminate between.
Option A SHOULD say: natural and synthetic corundums are incredibly easy to tell apart.
Compared to (E), option A is inferior. Except in extraordinary cases, sentences should not end with the word "between."
Eliminate A.
Possible split #3: parallelism
Arguably option A also violates parallelism.
We could argue that A compares varieties as a noun to natural and synthetic, which are adjectives.
That is, (A) incorrectly compares a noun to adjectives.
Tough call. Every once in a while the GMAT allows the comparison to stand if Y is a noun preceded by adjectives.
Deciding between A and E, though, is not hard.
Option E is clear and captures the meaning described at the beginning of the post.
ANSWER E
Takeaway: in that it is may seem "wordy," but
(1) the phrase is idiomatic (2) it is often used in sophisticated writing, and
(3) it is part of the only answer that makes sense.
P.S. a bit delayed because I haven't seen your posts before, but wunstepcloser , welcome to GMAT Club!
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