Correct Answer: B

Rationale: The correct answer is B: Myelomeningocele. McEwen sign refers to the characteristic scalloping of the frontal bones due to pressure from the expanding brain in individuals with myelomeningocele. This sign is specific to myelomeningocele and is not associated with hydrocephalus (A), microcephaly (C), or encephalocele (D), which have different clinical manifestations and imaging findings. Myelomeningocele is a neural tube defect where the spinal cord and its coverings protrude through an opening in the spine, leading to neurological deficits and associated signs like McEwen sign.

Correct Answer: C

Rationale: The correct answer is C: Consideration of prophylactic therapy. A 12-mm induration in a healthcare worker is considered positive for PPD. In the absence of active TB on chest radiograph, the next step is to consider prophylactic therapy to prevent the development of active TB. This is based on the guidelines for the management of latent TB infection. Choice A is incorrect as a positive PPD warrants further evaluation regardless of the chest radiograph result. Choice B, the Quantiferon assay, is not the next step after a positive PPD and negative chest radiograph. Choice D, beginning therapy for pulmonary TB pending sputum cultures, is not indicated in this scenario as there is no evidence of active TB.

Correct Answer: C

Rationale: The correct answer is C: Homeopathy. Homeopathy involves using highly diluted substances to stimulate the body's natural healing processes. In labor, homeopathy can help manage pain and support relaxation. Entonox (A) and Diamorphine (D) are pharmacological measures, while Cyclothane (B) is not a recognized pain relief option in labor. Homeopathy aligns with non-pharmacological approaches, making it the most suitable choice for pain relief in labor.

Correct Answer: D

Rationale: In True cephalopelvic disproportion, the baby's head is too large to pass through the mother's pelvis. This condition often requires operative delivery (C-section) as a vaginal birth is not possible. Choice D is correct because operative delivery is indeed needed to safely deliver the baby. Choice A is incorrect as not all patients with cephalopelvic disproportion will necessarily require operative delivery. Choice B is also incorrect as the issue cannot generally be overcome during labor due to physical constraints. Choice C is incorrect as operative delivery is usually necessary in cases of true cephalopelvic disproportion to prevent complications.

Correct Answer: D

Rationale: The correct answer is D: Obturator sign. This finding indicates irritation of the peritoneum and is associated with a ruptured appendix, not acute pancreatitis. A: Severe epigastric pain with radiation to the back is a common presentation of acute pancreatitis, but not necessarily indicative of a seriously ill patient. B: Abdominal guarding and rigidity may suggest peritonitis but are not specific to acute pancreatitis. C: Grey Turner sign, bruising of the flanks, is associated with severe pancreatitis but does not necessarily indicate a seriously ill patient.