Correct Answer: B

Rationale: The correct answer is B: Vulvodynia. Vulvodynia is characterized by chronic vulvar pain or discomfort, including stabbing pain and burning, without an identifiable cause. In this case, the young girl is experiencing these symptoms despite not being sexually active, ruling out other conditions like vulvitis (inflammation of the vulva), vaginitis (inflammation of the vagina), and Bartholin's cyst (fluid-filled swelling near the vaginal opening). The absence of sexual activity suggests that the pain is not related to an infection or trauma, further supporting the diagnosis of vulvodynia.

Correct Answer: C

Rationale: The correct answer is C because the severity of an anaphylactic reaction can vary greatly from one episode to another in the same patient. Anaphylactic reactions are unpredictable and can be influenced by various factors such as the amount of allergen exposure, individual immune response, underlying health conditions, and concurrent medications. Therefore, it is not possible to reliably gauge the severity of a patient's anaphylactic reaction even if it has occurred repeatedly in the past. Choice A is incorrect because the onset of symptoms alone is not a reliable predictor of the severity of the reaction. Choice B is incorrect as well because there is no set formula to predict that the reaction will be one-third more severe than the patient's last reaction. Choice D is incorrect because stating that the reaction will generally be slightly less severe than the last reaction is also not accurate or supported by evidence.

Correct Answer: D

Rationale: The correct answer is D, performance of pelvic muscle exercises. Pelvic muscle exercises, also known as Kegel exercises, help strengthen the pelvic floor muscles which support the bladder, uterus, and bowel. By strengthening these muscles, the risk of developing cystocele, rectocele, and uterine prolapse postpartum is reduced. It is a proactive approach to prevent these conditions. Choice A, maintenance of good perineal hygiene, is important for preventing infections but does not specifically address the risk of pelvic organ prolapse. Choice B, prevention of constipation, is also important but does not directly target the muscle weakness that contributes to prolapse. Choice C, increased fluid intake for 2 weeks postpartum, is not as effective in preventing prolapse as pelvic muscle exercises. In summary, pelvic muscle exercises are the most appropriate recommendation as they directly address strengthening the muscles that support the pelvic organs, reducing the risk of prolapse postpartum.

Correct Answer: A

Rationale: The correct answer is A: Liver function tests (LFTs). Yellow skin can indicate jaundice, a sign of liver dysfunction, often seen in patients with liver issues or chemotherapy-related liver toxicity. LFTs including bilirubin, ALT, AST, and ALP can help assess liver function. B: Complete blood count (CBC) and C: Platelet count are not directly related to yellow skin and would not provide information on liver function. D: Blood urea nitrogen and creatinine are tests for kidney function, not liver function. While kidney dysfunction can sometimes cause yellow skin, LFTs are more specific for assessing liver function in this context.

Correct Answer: A

Rationale: The correct answer is A: Diabetes. Erectile dysfunction can be caused by organic factors, such as diabetes, which affects blood flow and nerve function. Diabetes can lead to damage of blood vessels and nerves, impacting the ability to achieve and maintain an erection. Testosterone deficiency (choice B) can also contribute to erectile dysfunction, but it is not an organic cause. Anxiety (choice C) and depression (choice D) are psychological factors that can lead to erectile dysfunction, not organic causes. Parkinsonism (choice E) can affect sexual function, but it is not a common organic cause of erectile dysfunction.