Correct Answer: D

Rationale: The correct answer is D. Blood-tinged sputum is not a typical warning sign of cancer but rather a symptom that can indicate other serious conditions like respiratory issues or infections. Choices A, B, and C are common warning signs of cancer: palpable lumps or bumps, unexplained bruises, and persistent digestive issues are often associated with cancer and should be evaluated by a healthcare professional for further assessment and diagnosis.

Correct Answer: D

Rationale: The correct answer is to dispose of the antineoplastic wastes in the hazardous waste receptacle. Antineoplastic agents are hazardous materials, and proper disposal is crucial to prevent harm to individuals and the environment. Option A is incorrect because adjusting the dose based on the patient's present symptoms may not be safe without proper authorization. Option B is incorrect as hand hygiene should be performed both before and after administering medications. Option C is incorrect as gloves and a lab coat should be worn primarily during handling and administration, not just during preparation.

Correct Answer: B

Rationale: The correct answer is B. Malignant cells have different proteins in their membranes, such as tumor-specific antigens, which distinguish them from benign cells. Choice A is incorrect as cancer cells typically have a rapid and uncontrolled rate of mitosis. Choice C is incorrect as the size of cells alone does not distinguish between malignant and benign cells. Choice D is incorrect as the molecular structure is not the primary characteristic that distinguishes between malignant and benign cells.

Correct Answer: D

Rationale: The nurse should encourage patients to reduce other factors that increase the risk of developing second cancers, such as the use of tobacco and alcohol and exposure to environmental carcinogens and excessive sunlight. Choice A is too general and does not address the specific concerns of a cancer patient. Choice B uses fear tactics, which may not be the most effective approach. Choice C is vague and does not provide a clear rationale for the behavior change, unlike Choice D which specifically links the behaviors to reducing the risk of second cancers.

Correct Answer: B

Rationale: The correct advice for a patient with polycythemia vera is to drink plenty of fluids. This helps in reducing the risk of thrombosis by keeping the blood less viscous. Avoiding hot showers (Choice A) is not directly related to managing polycythemia vera. While avoiding tight and restrictive clothing (Choice C) can help improve circulation, it is not the most crucial advice for these patients. Avoiding prolonged sitting (Choice D) is important to prevent blood clots but is not as critical as staying well-hydrated.