Correct Answer: B

Rationale: The correct answer is B: Smallpox, anthrax, botulism. These are known biological weapons that can be used in mass casualty situations. Rabies, cholera, and meningitis (Choice A) are not typically used as biological weapons. Ebola, hepatitis B, and tetanus (Choice C) are serious diseases but are not commonly associated with biological warfare. Tuberculosis, influenza, and measles (Choice D) are infectious diseases but are not typically used as biological weapons of mass destruction.

Correct Answer: B

Rationale: The correct answer is B: 'It should be taken with meals.' Metformin should be taken with meals to minimize gastrointestinal side effects and improve absorption. Choice A is incorrect because metformin is actually associated with weight loss or weight neutrality. Choice C is incorrect as metformin is typically taken orally and not via injection. Choice D is also incorrect because metformin is not known to cause hypoglycemia as a primary side effect.

Correct Answer: A

Rationale: The correct answer is to pinch the skin and inject at a 45-degree angle when administering enoxaparin. This technique helps ensure proper administration of the medication. Massaging the injection site after administering is unnecessary and could increase the risk of bleeding. Administering at a 90-degree angle is not recommended for enoxaparin injections. Rotating injection sites is important to prevent tissue damage and irritation.

Correct Answer: D

Rationale: The correct answer is D: Airborne. Tuberculosis is spread through small droplets that remain airborne for longer periods, hence requiring airborne precautions. Choice A - Contact precautions are used for diseases spread by direct or indirect contact. Choice B - Droplet precautions are for diseases transmitted by large respiratory droplets that can travel short distances. Choice C - Protective isolation is not necessary for tuberculosis, as it is not spread through contact with the client.

Correct Answer: A

Rationale: The nurse should assess the client with a fractured femur and sharp chest pain first. Sharp chest pain in this client may indicate a pulmonary embolism, a life-threatening condition requiring immediate attention. The other options describe important patient conditions but do not pose an immediate threat to life like a potential pulmonary embolism does.