Correct Answer: D

Rationale: The correct answer is D: Kaposi’s sarcoma. This is a common AIDS-related cancer caused by Human Herpesvirus 8 (HHV-8) in immunosuppressed individuals. It presents as purplish lesions on the skin and mucous membranes. Squamous cell carcinoma (A) is not specific to AIDS. Leukemia (B) and Multiple myeloma (C) are not commonly associated with AIDS. Kaposi’s sarcoma is the hallmark cancer seen in AIDS patients due to their weakened immune system.

Correct Answer: A

Rationale: The correct answer is A: Hyperkalemia. In acute Addisonian crisis, the adrenal glands do not produce enough cortisol and aldosterone, leading to electrolyte imbalances. This results in increased potassium levels (hyperkalemia) due to lack of aldosterone to promote potassium excretion. Hypernatremia (choice B) is less likely as aldosterone deficiency leads to sodium loss. Reduced BUN (choice C) is unlikely as Addison's crisis does not directly affect urea levels. Hyperglycemia (choice D) is not typically seen in Addisonian crisis as cortisol deficiency usually results in hypoglycemia.

Correct Answer: C

Rationale: The correct answer is C because pronation-supination of the hand and forearm is a characteristic movement in Parkinson's disease called "pill-rolling tremor." This movement interferes with normal hand activities due to involuntary shaking. A is incorrect because exaggerated muscle flaccidity does not lead to frequent falls in Parkinson's disease. B is incorrect as hyperextension of the back and neck is not a characteristic movement of Parkinson's disease. D is incorrect as it combines all options, which is not accurate.

Correct Answer: A

Rationale: The correct answer is A because narcotics in high doses can depress the respiratory rate and cough reflex, which can be especially dangerous for a laryngectomy patient due to the risk of airway compromise. Low doses can provide pain relief without significant respiratory depression. Choices B and C are incorrect because narcotics typically do not increase respiratory tract secretions or cause stomal edema. Choice D is incorrect because while narcotics can potentially cause addiction, this is not the primary reason for giving low doses to laryngectomy patients.

Correct Answer: C

Rationale: Correct Answer: C - Dryness of mouth Rationale: 1. Trihexyphenidyl is an anticholinergic medication commonly used to treat Parkinson's disease. 2. Anticholinergic drugs inhibit the parasympathetic nervous system, leading to decreased secretions. 3. Dryness of mouth (xerostomia) is a common side effect of anticholinergic medications. 4. Excessive salivation, bradycardia, and constipation are not typically associated with anticholinergic drugs, making them incorrect choices.