Correct Answer: C

Rationale: In diabetic ketoacidosis (DKA), the body is in a state of metabolic acidosis due to the accumulation of ketones in the blood. One of the compensatory mechanisms to decrease the acidity in the body is increased breathing, known as Kussmaul breathing. This type of breathing is characterized by a rapid and deep pattern to blow off excess carbon dioxide and decrease the acidity of the blood. Therefore, in a patient with DKA, you would expect to observe rapid and deep breathing.

Correct Answer: C

Rationale: The information provided, specifically about the patient having three cesarean sections, is most appropriate to be placed under the Obstetrics/gynecology category. This category focuses on the healthcare of women, particularly during pregnancy, childbirth, and postpartum period, which includes details about cesarean sections. This information is not related to adult illnesses, surgeries in general, or psychiatric conditions.

Correct Answer: B

Rationale: The description of dark, granular material resembling coffee grounds in the vomitus suggests upper gastrointestinal bleeding. One common cause of upper GI bleeding is a peptic ulcer, which can present with symptoms such as vomiting blood or coffee ground material. Peptic ulcers can develop in the stomach or the upper part of the small intestine (duodenum). Risk factors for peptic ulcers include infection with Helicobacter pylori bacteria, the use of nonsteroidal anti-inflammatory drugs (NSAIDs), smoking, and alcohol consumption. Prompt evaluation and management are necessary in cases of upper GI bleeding to address the underlying cause and prevent complications.

Correct Answer: C

Rationale: The young woman in this scenario is experiencing symptoms consistent with post-traumatic stress disorder (PTSD). PTSD is an anxiety disorder that can develop after a person is exposed to a traumatic event, such as a life-threatening situation like a robbery with a gun involved. The symptoms she is experiencing, including difficulty sleeping, severe nightmares, irritability, hypervigilance, and avoidance of triggers such as driving at night, are all classic features of PTSD. These symptoms have persisted for at least 6 months since the traumatic event occurred, which is a key criterion for making a diagnosis of PTSD. Treatment for PTSD typically involves a combination of medication and therapy to help the individual process and cope with the traumatic experience.

Correct Answer: B

Rationale: Leaning forward in the upright position increases venous return and systemic vascular resistance, which can help accentuate the intensity of aortic regurgitation murmur. This position helps to bring the heart closer to the chest wall, making the murmur easier to auscultate and potentially increasing its intensity.