Correct Answer: D

Rationale: The correct answer is D: Undiagnosed, untreated diabetes mellitus. Hyperosmolar hyperglycemic nonketotic syndrome (HHNS) is most commonly caused by undiagnosed and untreated diabetes mellitus. Insulin overdose (Choice A) is not a typical cause of HHNS; it is more related to hypoglycemia. Removal of the adrenal gland (Choice B) can lead to adrenal insufficiency but is not a common cause of HHNS. Undiagnosed, untreated hyperpituitarism (Choice C) is not a usual cause of HHNS; it is more related to pituitary hormone imbalances rather than hyperglycemia.

Correct Answer: D

Rationale: The correct action to take when a patient becomes hypotensive with a bounding, rapid pulse rate after administering penicillin intravenously is to stop the intravenous flow immediately. This can help prevent further complications by discontinuing the administration of the medication that might be causing the adverse effects. Decreasing or increasing the rate of medication flow may not address the underlying issue of the patient's adverse reaction. While it's important to involve the healthcare provider in such situations, the immediate priority is to halt the administration of the medication.

Correct Answer: D

Rationale: To calculate the rate: 1000 cc/8 hours = 125 cc/hour. 125 cc/hour * 1 drop/20 cc * 1 hour/60 minutes = 40 gtts/min. Therefore, the correct answer is 40 gtts/min. Choice A (38 gtts/min) is incorrect as it doesn't match the calculation result. Choice B (42 gtts/min) is incorrect as it is not the calculated rate. Choice C (50 gtts/min) is incorrect as it is not the calculated rate either.

Correct Answer: A

Rationale: Wilms' tumor is a type of kidney cancer that primarily affects children. The correct answer is A: Renal cancer. This tumor originates in the kidneys and is most commonly found in children, with the peak incidence around 3-4 years of age. Choice B, Liver cancer, is incorrect as Wilms' tumor specifically involves the kidneys, not the liver. Choice C, Basal cell carcinoma, is a form of skin cancer, not related to Wilms' tumor. Choice D, Brain cancer, is incorrect as Wilms' tumor is not associated with the brain but rather with the kidneys.

Correct Answer: C

Rationale: Diabetes is classified as a chronic disease because it is a long-term condition that requires ongoing management. Choices A, B, and D, which are the common cold, influenza, and food poisoning, are acute illnesses that typically resolve on their own without long-lasting implications.