Correct Answer: D

Rationale: The correct answer is D because hypoplastic left heart syndrome involves underdevelopment of the left ventricle, aortic valve, and aortic arch. The left ventricle is typically small and unable to adequately pump blood to the body. The aortic valve is often malformed, leading to difficulties in blood flow from the heart to the body. Additionally, the aortic arch may be narrow or underdeveloped, further impacting blood circulation. Choice A is incorrect as it includes the pulmonary veins, which are not typically affected in hypoplastic left heart syndrome. Choice B is incorrect as it focuses on the left atrium and pulmonary vessels, which are not the primary structures affected in this condition. Choice C is incorrect as it mentions the aorta arch, venacava, and right atrium, which are not primarily associated with hypoplastic left heart syndrome.

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: D

Rationale: Placental parasitation is associated with Malaria prenatally because the Plasmodium parasite can infect the placenta through the bloodstream, leading to severe complications for both the mother and the fetus. This infection can result in low birth weight, preterm birth, and even stillbirth. Candidiasis, Tuberculosis, and Multiple gestation are not directly associated with placental parasitation. Candidiasis is a fungal infection, Tuberculosis is a bacterial infection, and Multiple gestation refers to carrying more than one fetus during pregnancy. Therefore, the correct answer is D, Malaria prenatally, due to the direct impact of Plasmodium parasite on the placenta and its implications on pregnancy outcomes.

Correct Answer: C

Rationale: Rationale for Correct Answer (C): A trial of scar is indicated when a woman has had no more than two previous caesarean sections. This is because the risk of uterine rupture increases with each subsequent caesarean section due to scar tissue weakening. Limiting the number of previous scars reduces this risk. Therefore, option C is correct. Summary of Incorrect Choices: A: Estimated fetal weight is not a determining factor for a trial of scar. B: Availability of a level one hospital nearby is important for emergency situations but not a criteria for trial of scar. D: Adequate pelvis with true conjugate 10.5cm is important for vaginal delivery but not a specific requirement for a trial of scar.

Correct Answer: C

Rationale: The correct answer is C: Truncus arteriosus. In this congenital heart defect, a single large blood vessel arises from the heart instead of the normal two separate vessels (aorta and pulmonary artery). This results in mixing of oxygenated and deoxygenated blood, leading to severe cyanosis and inadequate oxygen supply to the body. This condition is incompatible with life, causing immediate death after birth. A: Pulmonary stenosis and B: Aortic coarctation are also congenital heart defects but do not typically result in immediate death after birth. Pulmonary stenosis obstructs blood flow to the lungs, while aortic coarctation causes narrowing of the aorta. D: Ductus arteriosus is a normal fetal blood vessel that connects the pulmonary artery and the aorta but usually closes shortly after birth. Failure of closure can lead to health issues, but it is not typically a cause of immediate death after birth.