Correct Answer: A

Rationale: The correct punctuation needed in the sentence is a period. A period is needed at the end of the sentence to indicate the completion of the thought and to make it a grammatically correct statement. The other options (comma, question mark, exclamation mark) do not fit the context of the sentence. In this case, a period is used to end a declarative sentence, stating a fact without needing any additional punctuation for the context provided.

Correct Answer: A

Rationale: The correct preposition to use in this sentence is 'with.' The sentence should read: 'Do not be afraid to consult with your peers.' In this context, 'with' is the appropriate preposition to indicate collaborating or seeking advice from your peers. The other prepositions ('from,' 'by,' 'in') do not convey the intended meaning of seeking advice or collaborating with your peers in this context.

Correct Answer: A

Rationale: The word 'oneself' is a reflexive pronoun that refers back to the subject of the sentence, allowing the sentence to be grammatically correct. Options B and C, 'oneselves' and 'hisself,' are not standard English words. Option D, 'themselves,' is a plural pronoun and does not agree with the singular noun 'one' in the sentence.

Correct Answer: B

Rationale: The correct punctuation needed in the sentence is a comma. The sentence should be: 'Follow my lead, I have been performing this procedure for years.' The comma is necessary to separate the introductory phrase 'Follow my lead' from the main clause that follows. The other choices are incorrect because a period would create two separate sentences, an exclamation point is not suitable for the context, and a semicolon would be too strong of a punctuation mark for this sentence structure.

Correct Answer: B

Rationale: The word 'prescription' in the sentence is misspelled as 'proscription.' A prescription is a written order for medication or treatment provided by a healthcare professional, while a proscription means a forbidding or prohibition. The other choices (A, C, D) are all correctly spelled in the context of the sentence.