Correct Answer: A

Rationale: The presentation described, involving multiple grouped vesicles on an erythematous base in the genital area, is classic for herpes simplex genitalis. This condition is caused by the herpes simplex virus (HSV) and is characterized by recurrent outbreaks of painful vesicles in the genital or perianal area. The history of similar lesions occurring during periods of stress is also suggestive of herpes simplex virus reactivation. Genital warts (condyloma acuminata) typically present as painless, fleshy growths in the genital area caused by human papillomavirus (HPV). Syphilis manifests as a painless ulcer known as a chancre, which is not described in the presentation. Molluscum contagiosum presents with pearly, dome-shaped papules with central umbilication, rather than vesicles.

Correct Answer: A

Rationale: Selective IgA deficiency is a primary immunodeficiency disorder characterized by low or absent levels of immunoglobulin A (IgA) in the blood. Since IgA plays a crucial role in mucosal immunity and defense against pathogens at mucosal surfaces, individuals with this deficiency are more susceptible to recurrent bacterial infections, particularly of the respiratory and gastrointestinal tracts. In contrast, severe combined immunodeficiency (SCID) is a more severe immunodeficiency disorder affecting T and B lymphocytes, chronic granulomatous disease (CGD) is a disorder of phagocytes, and autoimmune hemolytic anemia is an autoimmune disease involving red blood cells, none of which are directly associated with selective IgA deficiency.

Correct Answer: A

Rationale: At the concrete operational stage according to Piaget's theory, children typically demonstrate logical thinking abilities and are able to understand and work with concrete objects and events. They can also grasp concepts such as conservation and classification. These children are able to think logically about concrete events but may still struggle with abstract and hypothetical situations. Therefore, Belle, functioning at the concrete operational stage, would exhibit behaviors such as thinking logically and being able to see possibilities, as described in option A.

Correct Answer: D

Rationale: The cough of a patient with lung cancer typically starts off as dry and persistent. This is because lung cancer can irritate the airways, leading to a persistent dry cough as an early symptom. As the cancer progresses, the cough may become more productive with blood-tinged or dark yellow sputum. However, in the early stages, the cough is often dry and persistent, which can be a warning sign for healthcare providers to further investigate potential underlying issues such as lung cancer.

Correct Answer: A

Rationale: In a patient with acute gastrointestinal bleeding requiring urgent intervention, the healthcare team should prioritize performing endoscopic hemostasis with mechanical or thermal techniques. Endoscopy allows for direct visualization of the source of bleeding in the gastrointestinal tract, enabling targeted interventions such as clipping, cauterization, or injection of epinephrine to achieve hemostasis. This approach is effective in managing acute bleeds and can help stop the bleeding quickly, reducing the need for more invasive procedures or surgeries. Administering proton pump inhibitors (PPIs) may be considered for acid-related bleeding, but it is not the primary intervention for acute bleeding requiring urgent management. Strict bed rest may not be necessary and can increase the risk of complications such as deep vein thrombosis. Transfusion of fresh frozen plasma may be indicated if there is evidence of coagulopathy, but addressing the bleeding source should be the initial priority to