Correct Answer: A

Rationale: The correct answer is A. In the sentence, 'be observed' should be changed to 'should be observed' for proper grammar. 'Should be observed' is the correct way to indicate the necessity of maintaining confidentiality. Choice B, 'by,' is used correctly as a preposition. Choice C, 'can be,' is also used correctly in the sentence. Choice D, 'should not,' is correctly used to indicate what the nurse ought not to do.

Correct Answer: D

Rationale: The term 'posterior' refers to the back of the body. Therefore, the correct answer is 'Back.' Choices A, B, and C are incorrect. 'Topmost' and 'Lowermost' do not specifically refer to the back of the body, and 'Front' is the opposite of 'Back.'

Correct Answer: C

Rationale: The correct answer is 'C: Hers.' The possessive pronoun 'hers' does not require an apostrophe. The use of 'her's' with an apostrophe is grammatically incorrect. Choices A, B, and D ('Backpack,' 'Student,' and 'Recognize') are all spelled correctly and are grammatically sound in the sentence provided.

Correct Answer: D

Rationale: 'Oneself' is the correct reflexive pronoun to use when referring to an unspecified person. In this sentence, 'oneself' is used to indicate any individual without specifying gender or number. Choices A, B, and C are incorrect as they refer to specific or known individuals, which does not fit the context of the sentence.

Correct Answer: D

Rationale: The correct answer is 'Having.' In the sentence 'I am looking forward to having my birthday party next week,' 'having' is the correct present participle form of the verb 'have' to indicate an anticipated event. Choice A 'Going' is incorrect as it does not match the structure of the sentence. Choice B 'Go' is incorrect as it is the base form of the verb and does not fit grammatically. Choice C 'Have' is incorrect as it is the base form and does not convey the future action in the sentence.