Correct Answer: A

Rationale: The correct answer is A: Fever ≥ 38°C for three consecutive occasions. Puerperal pyrexia is defined as fever occurring after childbirth. The key diagnostic feature is the presence of fever (≥ 38°C) on three consecutive occasions, indicating a persistent infection. Choice B is incorrect because it doesn't specify the need for consecutive occasions. Choice C is incorrect as it extends the duration of fever to three weeks, which is too long for typical puerperal pyrexia. Choice D is incorrect as it mentions "occasionally" instead of "consecutively," which is not indicative of a consistent fever pattern seen in puerperal pyrexia.

Correct Answer: D

Rationale: The correct answer is D because in the context of neoadjuvant chemotherapy, a partial response means converting an unresectable tumor to a resectable one. This is crucial as it allows for successful surgical removal of the tumor. Choices A, B, and C do not accurately define partial response in the context of cancer therapy. A, stating 50% of patients demonstrating remission, is not specific to the change in resectability. B, mentioning 50% survival at 5 years, is more related to overall survival rather than the response to treatment. C, stating a reduction in tumor mass by >50%, does not necessarily imply a change in resectability status. Therefore, option D is the most appropriate definition of partial response in the given scenario.

Correct Answer: D

Rationale: Step-by-step rationale: 1. External examination can reveal the position of the baby's head. 2. Ultrasound can confirm the baby's position accurately. 3. Physical exam and pelvic exam findings can provide additional information. 4. Combining both methods (A and B) ensures a comprehensive assessment for accurate diagnosis. Summary: - Choice A alone may not provide sufficient information. - Choice B alone may not be as accurate as combined with ultrasound. - Choice C is not specific to diagnosing occipito-posterior position. - Choice D is correct as it combines external examination, ultrasound, and physical exam for accurate diagnosis.

Correct Answer: B

Rationale: The correct answer is B: Turtle sign. This sign refers to the fetal head retracting against the perineum during delivery. It indicates shoulder dystocia, a complication where the baby's shoulders get stuck after the head is delivered. This can lead to serious complications for both the baby and the mother if not managed promptly. A: Gaskin sign is incorrect as it refers to a position where the mother is on her hands and knees during labor. C: Klumpke sign is incorrect as it is a neurological condition affecting the lower arm and hand. D: Chignon sign is incorrect as it is not a recognized medical term related to childbirth.

Correct Answer: D

Rationale: The correct answer is D because deep transverse arrest refers to a situation where the fetal head fails to rotate and descend in the pelvis due to the occiput and sinciput being at the same level. This leads to a prolonged labor. Choice A is incorrect because flexion can be inadequate in deep transverse arrest. Choice B is incorrect because it is not solely caused by uterine contractions but rather fetal malposition. Choice C is incorrect because a well-curved sacrum is not a defining factor in deep transverse arrest.