What is the correct preposition to complete the sentence?
A tuberculin skin test should be read within 24 hours __________ administration.

Rationale

A tuberculin skin test should be read within 24 hours of administration.

The preposition "of" is used here to indicate the relationship between the reading of the test and the administration of the tuberculin. It effectively connects the timing of the reading to the action of administering the test.

A (of) CORRECT

This is the correct choice, as it appropriately indicates that the reading of the test occurs within a specified timeframe following the administration. The phrase "within 24 hours of administration" clearly conveys the time limit relevant to the process.

B (since) YOUR ANSWER

The preposition "since" implies a causal relationship or a starting point in time, which is not suitable in this context. The sentence is meant to express a timeframe rather than a cause-and-effect relationship, making "since" inappropriate for completing the sentence accurately.

C (as) YOUR ANSWER

Using "as" suggests simultaneous actions or conditions, which does not fit the context of the sentence. The sentence is focused on the reading occurring after the administration, thus "as" fails to convey the intended sequence of events.

D (from) YOUR ANSWER

The preposition "from" indicates a starting point but lacks the clarity needed in this sentence regarding the specified interval. It would imply a broader time frame rather than the precise duration of "within 24 hours," which is essential for the proper understanding of when the test should be read.

Conclusion

The correct preposition "of" effectively links the timing of the tuberculin skin test reading to its administration, establishing a clear and concise time frame. The other choices fail to convey the intended meaning, highlighting the importance of selecting the appropriate preposition to maintain clarity in medical guidelines.

What is the correct preposition to complete the sentence? A tuberculin skin test should be read within 24 hours __________ administration.

A tuberculin skin test should be read within 24 hours of administration.

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What is the correct preposition to complete the sentence?
A tuberculin skin test should be read within 24 hours __________ administration.