Digital PSAT Reading and Writing Practice Question 122: Answer and Explanation

Question: 122

A newly formed photon carries with it a sort of chemical signature called an emission spectrum, which is _____________ to the element from which it was emitted.

Which choice completes the text so that it conforms to the conventions of Standard English?

  • A. one of the only of its kind
  • B. partial
  • C. uniquely
  • D. specific

Correct Answer: D

Explanation:

(D) Specific in this case means "unique," stating that the particular chemical signature given off by each element is unique to it. Choice (A) is too wordy. Choice (B) is incorrect because partial to means "to prefer" something. Choice (C) uses an adverb instead of an adjective.

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