Correct Answer: A

Rationale: The correct order of basic CPR is to first ensure the scene is safe to approach, then assess responsiveness. Next, call for help and start CPR with chest compressions, followed by checking the airway and giving rescue breaths. Choice B is incorrect as giving rescue breaths is usually done after the initial chest compressions. Choice C is incorrect as looking, listening, and feeling for breathing comes after starting compressions. Choice D is incorrect as chest compressions are usually the first step in basic CPR.

Correct Answer: D

Rationale: The correct answer is Vitamin K. Prolonged antibiotic use can disrupt the gut flora, leading to Vitamin K deficiency and an increased risk of bleeding. Vitamin A deficiency is not commonly associated with antibiotic use. Similarly, Vitamin B6 and Vitamin C deficiencies are not typically linked to prolonged antibiotic use.

Correct Answer: D

Rationale: The correct answer is D, Hypokalemia. Diuretics commonly lead to hypokalemia, which is low potassium levels in the body. Hyperkalemia (choice A) is the opposite, indicating high potassium levels. Hypercalcemia (choice B) refers to elevated calcium levels, not typically associated with diuretics. Hypomagnesemia (choice C) is low magnesium levels and can also be a consequence of diuretic use, but potassium imbalance is more common.

Correct Answer: D

Rationale: In patients with chronic alcoholism, the most likely nutrient deficiency is Vitamin B1 (thiamine), not Vitamin B12. Chronic alcoholism often leads to Vitamin B1 deficiency, causing conditions like Wernicke's encephalopathy. While other vitamin deficiencies can also occur in chronic alcoholism, such as Vitamin C and Vitamin D, Vitamin B1 deficiency is more commonly associated with alcoholism.

Correct Answer: A

Rationale: The correct order of basic CPR steps is as follows: first, ensure the scene is safe to approach, then assess the individual's responsiveness. After confirming the need for help, start chest compressions, then provide two rescue breaths. Option B, 'Give two rescue breaths,' is incorrect as chest compressions should be initiated before giving rescue breaths. Option C, 'Look, listen, and feel for breathing,' is also incorrect as immediate chest compressions are crucial in CPR. Option D, 'Begin chest compressions,' is partially correct but misses the crucial initial steps of ensuring scene safety and assessing responsiveness.