Correct Answer: A

Rationale: The correct answer is A: Hypogastrinemia and acid hyposecretion. Gastrinoma is a tumor that secretes excessive gastrin, leading to hypergastrinemia and increased acid secretion. However, due to a negative feedback mechanism, chronic exposure to high gastrin levels can cause downregulation of gastrin receptors on parietal cells, leading to decreased acid secretion. Therefore, in gastrinoma, despite high gastrin levels, acid secretion may be reduced due to this negative feedback loop. Choices B, C, and D are incorrect because they do not align with the expected relationship between gastrin levels and acid secretion in gastrinoma.

Correct Answer: B

Rationale: Step 1: Feminizing adrenal tumors are not always carcinomas, so A is incorrect. Step 2: Virilizing tumors in women can originate from adrenal or extra-adrenal sites, so C is incorrect. Step 3: Virilizing adrenal tumors are usually benign, especially in children, so D is incorrect. Step 4: B is correct as feminizing adrenal tumors are rare but are the most common type of adrenal tumor causing gender symptoms.

Correct Answer: B

Rationale: The correct answer is B: Hyperemesis gravidarum. This condition is characterized by severe nausea and vomiting during pregnancy, leading to inability to eat or retain feeds. It is associated with significant weight loss and dehydration. Other choices are incorrect because: A: Weight gain control is not the primary concern when hyperemesis gravidarum is present. C: Morning sickness typically does not cause severe inability to eat or retain feeds. D: Preeclampsia is a separate condition characterized by high blood pressure and organ damage, not directly related to feeding difficulties.

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: A

Rationale: The correct answer is A: 60 compressions coordinated with 30 breaths per minute. In neonatal resuscitation, the recommended compression-to-ventilation ratio is 3:1. This means 3 compressions are given followed by 1 breath. With a target compression rate of 120 per minute, this translates to 60 compressions coordinated with 30 breaths per minute. Each compression should be at a depth of about one-third the anterior-posterior diameter of the chest. This ratio and rate are crucial for maintaining adequate circulation and oxygenation during neonatal resuscitation. Choice B: 3 compressions coordinated with 1 breath per minute is too slow and would not provide enough support for the neonate's circulation. Choice C: 1 compression coordinated with 3 breaths per minute would not provide sufficient compressions to maintain circulation. Choice D: 90 compressions coordinated with 30 breaths per minute would result in an incorrect compression-to-vent