Correct Answer: D

Rationale: Hepatomegaly is correct. Right-sided heart failure leads to systemic venous congestion, which can cause liver enlargement (hepatomegaly), ascites, and peripheral edema. Dizziness is more commonly associated with left-sided heart failure due to decreased cardiac output. Crackles in the lungs and dry hacking cough are symptoms of left-sided heart failure due to pulmonary congestion.

Correct Answer: C

Rationale: Obesity is correct. Excess weight, particularly around the neck, increases the risk of airway obstruction during sleep, making obesity a major risk factor for obstructive sleep apnea. Deep vein thrombosis is not a known risk factor. Being female is incorrect as obstructive sleep apnea is more common in males. Atherosclerosis is not a direct risk factor, though untreated sleep apnea can contribute to cardiovascular issues.

Correct Answer: D

Rationale: Small, frequent meals reduce abdominal distention and diaphragm pressure, preventing dyspnea. Caloric intake, social interaction, and balanced diet are secondary considerations.

Correct Answer: A

Rationale: Pleural effusion is a common complication of heart failure. Increased pulmonary circulation pressure causes fluid accumulation in the pleural space. Infection, asthma, and hemorrhage are not direct complications of heart failure.

Correct Answer: A

Rationale: Delivering a continuous flow of air pressure to keep the airway open is correct. CPAP prevents airway collapse during sleep, allowing for uninterrupted breathing and oxygenation. Reducing daytime sleepiness, improving sleep quality, and promoting weight loss are benefits but not the primary purpose.