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Sentence Correction: Parallelism Questions - Overview

Feeling fatigued and dizzy, having pale skin, an irregular heartbeat, and shortness of breath are among the standard symptoms of anemia, a condition in which the blood lacks sufficient healthy red blood cells.

Incorrect.

This answer choice is grammatically incorrect.

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In this list the items are not the same parts of speech: feeling, having are verbs, dizzy is an adjective and an irregular heartbeat and shortness of breath are nouns.

Incorrect.

This answer choice is grammatically incorrect.

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While this answer choice corrects the Parallelism mistake in the original question, by changing the verb feeling to a noun a feeling and changing the adjective dizzy to a noun dizziness, it creates a new grammatical mistake and is stylistically flawed.

Verb+ing (breathing) can be used as a noun replacement only when there's no actual noun. Since there is a real noun - breath - it should be used.

Well done!

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This answer choice corrects the Parallelism mistake in the original question by replacing the redundant verb feeling (fatigued) and the adjective dizzy with the nouns Fatigue and dizziness, and by changing the redundant verbal phrase having pale skin with the noun phrase pale skin. The resulting list is comprised of parallel nouns.

Incorrect.

This answer choice is stylistically flawed. The phrase paleness of skin is redundant and awkward. The same meaning can be expressed more concisely by simply using an adjective+noun pale skin.

In addition, heartbeat irregularity is non-idiomatic in English.

Incorrect.

This answer choice is grammatically incorrect.

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In this list the first two items are verbs (feeling, having) and the second two are nouns (heartbeat, shortness).

Feeling fatigued and dizzy, having pale skin, an irregular heartbeat, and shortness of breath
Feeling fatigued, dizzy, having pale skin, an irregular heartbeat, and shortness of breath
A feeling of fatigue and dizziness, pale skin, an irregular heartbeat, and shortness of breathing
Fatigue, dizziness, pale skin, an irregular heartbeat, and shortness of breath
Fatigue, dizziness, paleness of skin, heartbeat irregularity, and shortness of breath