Correct Answer: B

Rationale: The correct answer is 'Stimuli.' When forming the plural of 'stimulus,' the correct form is 'stimuli.' Choice A, 'Stimulus,' is the singular form, not the plural. Choice C, 'Stimulis,' is an incorrect spelling. Choice D, 'Stimula,' is also an incorrect form for the plural of 'stimulus.' Therefore, 'Stimuli' is the only correct plural form.

Correct Answer: A

Rationale: The correct answer is A: 'Undesirable.' In this context, 'adverse' means harmful or undesirable, specifically referring to the negative side effects experienced from the medication. Choice B, 'Frequent,' is incorrect as 'adverse' does not imply how often the side effects occur but rather their nature. Choice C, 'Noticeable,' is incorrect as 'adverse' does not necessarily mean that the side effects are easily noticeable, but rather that they are harmful. Choice D, 'Constant,' is incorrect as 'adverse' does not indicate that the side effects are continuous but rather that they are negative.

Correct Answer: B

Rationale: The correct answer is 'B: Residual.' In the given sentence, 'residual' is used to describe something that is left or remaining. 'Residual' fits the context perfectly as it aligns with the definition of what remains. The other choices are incorrect: A) 'Resident' refers to a person living in a specific place, C) 'Resistance' is the act of opposing or withstanding something, and D) 'Resin' is a sticky substance produced by plants.

Correct Answer: C

Rationale: The correct answer is C because the environment refers to the surroundings or conditions in which a person, animal, or plant lives or operates, encompassing both internal and external factors. Choices A, B, and D are incorrect as they do not accurately define the concept of 'environment.' Choice A is too broad and does not specifically address the components of an environment. Choice B is vague and does not capture the entirety of what an environment entails. Choice D is limited in scope, focusing solely on a home environment rather than the broader concept of environment.

Correct Answer: C

Rationale: The correct answer is C, 'Surveillance,' which means 'under observation.' 'Cognition' (A) refers to mental processes, 'Isolation' (B) means being separated from others, and 'Assessment' (D) is the evaluation of something, none of which directly relate to being observed.