Correct Answer: B

Rationale: The word 'deferentially' means showing respect or submission to someone. Therefore, the closest synonym for 'deferentially' is 'respectfully' as it reflects the attitude and behavior of showing respect towards others. The other choices are incorrect: 'Imperfectly' means with flaws or errors, 'Competently' means having the necessary ability or skills, and 'Energetically' means with energy or enthusiasm, none of which capture the respectful connotation of 'deferentially.'

Correct Answer: B

Rationale: A treatment that is detrimental is considered destructive because it causes harm or damage rather than benefiting the individual. In this context, 'detrimental' implies that the treatment has negative effects and is harmful rather than helpful. Choices A, C, and D are incorrect because a detrimental treatment is not risk-free, agonizing, or effective; instead, it is harmful and damaging.

Correct Answer: D

Rationale: The term 'anodyne' refers to something that relieves or alleviates pain or discomfort. Therefore, the best description for anodyne is 'painkilling.' Choices A (Emulsified), B (Liquefied), and C (Contaminated) are incorrect as they do not accurately represent the meaning of anodyne.

Correct Answer: A

Rationale: The word 'inconclusive' in the sentence describes the data as not definitive or final, indicating that further tests are needed to reach a solid conclusion. 'Inconclusive' means not leading to a firm decision or result, making 'unsettled' the most suitable synonym in this context. Choice B, 'convincing,' does not align with the meaning of 'inconclusive' as it suggests that the data is already clear and persuasive, which contradicts the context. Choice C, 'unfavorable,' is not the best fit as 'inconclusive' does not imply a negative or unfavorable outcome but rather indicates a lack of a definitive answer. Choice D, 'bewildering,' does not capture the meaning of 'inconclusive' in this context. Bewildering implies confusion or puzzlement, which is not the intended meaning in the sentence.

Correct Answer: D

Rationale: The correct answer is D: Flexible. Plastic is a material that can be easily molded or shaped, known for its flexibility. It can bend and stretch without breaking, making it versatile and durable. Choices A, B, and C are incorrect because plastic is not primarily associated with being mechanical, authentic, or durable, but rather with its ability to be shaped and its flexibility.