Correct Answer: A

Rationale: The best description of the verb emit is 'to discharge.' Emit means to produce and release something such as a sound, odor, or substance. Discharge is synonymous with emit in this context as it conveys the idea of releasing or sending out something, which aligns with the meaning of emit. Choices B, C, and D are incorrect. 'To exclude' means to deny access or prevent from entering, which is not the same as emit. 'To dismiss' means to remove from consideration or to let go, which is different from emitting. 'To moderate' means to make or become less extreme, intense, or severe, which is not the same as emitting or releasing something.

Correct Answer: B

Rationale: The correct answer is B. parietal. The parietal bone is one of the eight bones that form the human skull. It is located near the top of the skull and forms the sides and roof of the cranium. The parietal bones come together at the top of the skull in a structure called the sagittal suture. Choices A, C, and D are incorrect as they do not refer to any cranial bone. 'Partial' means incomplete, 'pariah' refers to an outcast or social reject, and 'parhelion' is a bright spot appearing on either side of the sun.

Correct Answer: C

Rationale: In the context of the sentence, the word 'placebo' refers to a substance or treatment that resembles a real medical treatment but has no therapeutic effect. It is used as a standard against which the effects of the experimental drug are compared. A placebo is typically included in a control group in medical research to evaluate the actual effects of the experimental drug. Therefore, in this scenario, the placebo serves as a control to gauge the effectiveness of the experimental drug, making choice C the correct answer. Choices A, B, and D are incorrect because a placebo is not a fallback, substitute, or curative treatment in this context.

Correct Answer: B

Rationale: In the sentence, "laceration" is referring to a deep cut or tear in the skin. It is often associated with injuries that are caused by sharp objects or trauma. Therefore, the most appropriate meaning of "laceration" in this context is a cut.

Correct Answer: C

Rationale: The word 'formulaic' means following a formula or set pattern. Therefore, something that is systematic and follows a structured plan can also be described as formulaic. Choices A, B, and D are incorrect. 'Involuntary' means done without will or conscious control, 'universal' means affecting, or done by all people or things in the world, and 'manual' means operated or done by hand rather than automatically or electronically. Therefore, 'formulaic' is the most accurate synonym in the given context.