Correct Answer: A

Rationale: Crystals in the solution are not normal and should not be administered to the client. Discarding the solution and ordering a new bag is the correct action to ensure the client's safety. Warming the solution, as suggested in answer B, will not resolve the issue of crystals and cloudiness, which could potentially harm the client. Continuing the infusion, as in answer C, could pose a risk to the client due to the presence of abnormal substances. Answer D, discontinuing the medication, would typically require a doctor's order and should be done after discarding the contaminated solution.

Correct Answer: B

Rationale: The correct answer is 'pharmacodynamic.' Pharmacodynamics pertain to the effect of a drug on receptors, explaining how drugs affect tissues. Pharmaceutical reactions refer to chemical reactions between drugs before administration or absorption, not their effect on tissues. Pharmacokinetic reactions involve how the body affects the drug, not the tissue. Drug incompatibilities are essentially pharmaceutical reactions, not the specific effects on tissues seen in pharmacodynamic reactions.

Correct Answer: D

Rationale: The correct answer is to inform the patient that they will have to lie down on their back during the MRI. This positioning is necessary for the scan to obtain accurate images of the brain. Choice A is incorrect because the decision on the positioning during the MRI is typically determined by the imaging protocol and not subject to negotiation during the test. Choice B is incorrect as the reverse Trendelenburg position is not commonly used during MRI scans. Choice C is incorrect because the radiologist does not usually make decisions on patient positioning during the MRI; it is predetermined by the imaging requirements.

Correct Answer: A

Rationale: The correct response acknowledges that hospitalization can lead to a crisis for both patients and their families. By asking if the wife has coped with problems before, it opens up a dialogue about her coping mechanisms and past experiences. This can help the husband understand his wife's current behavior better and provide valuable insights. Choices B, C, and D do not directly address the potential crisis that hospitalization can cause or inquire about the wife's coping strategies, making them less effective responses.

Correct Answer: B

Rationale: The correct answer is 'She pulls a toy behind her.' This behavior is consistent with the developmental stage of an 18-month-old who enjoys push-pull toys. Dressing oneself usually begins around 3 years old, building a tower of eight blocks at approximately 3 years old, and copying a horizontal or vertical line at about 4 years old. Choices A, C, and D are incorrect as they represent skills that are typically observed in older children.