Correct Answer: A

Rationale: The correct answer is A: Bradycardia. Hypothermia neonatorum is characterized by low body temperature in newborns, which can lead to bradycardia as the heart rate decreases in response to the cold stress. Bradycardia is a common physiological response to hypothermia as the body tries to conserve energy and maintain vital functions. Hyperglycemia, hypoventilation, and hyperventilation are not specific clinical features of hypothermia neonatorum. Hyperglycemia is more commonly associated with conditions like diabetes, hypoventilation could be a sign of respiratory distress, and hyperventilation is usually seen in response to metabolic acidosis or anxiety.

Correct Answer: B

Rationale: The correct answer is B: Placental bed. Malaria parasites hide in the placental bed during pregnancy to avoid detection by the immune system. This location provides a safe haven for the parasites to survive and replicate without being cleared by the mother's immune response. The placental bed offers a rich blood supply and a favorable environment for the parasites to thrive. Incorrect choices: A: Bone marrow - Malaria parasites do not typically hide in the bone marrow during pregnancy. C: Fetal circulation - Malaria parasites do not hide in the fetal circulation; they primarily reside in the placental bed. D: Uterine muscle - Malaria parasites do not hide in the uterine muscle; the placental bed is the main site of sequestration during pregnancy.

Correct Answer: A

Rationale: The correct answer is A: Erb’s palsy. Excessive traction and twisting of the neck during shoulder delivery can stretch or tear the brachial plexus nerves, leading to Erb’s palsy. This results in weakness or paralysis of the arm. Radial palsy (B) involves injury to the radial nerve, not typically caused by shoulder delivery. Torticollis (C) is a condition characterized by neck muscle contracture, not caused by excessive traction during delivery. Ecchymosis (D) refers to bruising and is not directly related to neck traction during delivery. In summary, Erb’s palsy is the correct choice due to the specific nerve injury pattern associated with excessive neck traction during shoulder delivery.

Correct Answer: C

Rationale: The correct answer is C: Fever. Physiologic stress ulcers are often associated with systemic stress response, leading to an increase in body temperature. Fever is an early sign of stress-related ulcers before other symptoms like epigastric pain or hemorrhage manifest. Change in mental status is more indicative of neurological issues rather than stress ulcers. Epigastric pain typically occurs after the ulcer has progressed, and hemorrhage is a severe complication of untreated stress ulcers.

Correct Answer: C

Rationale: The correct answer is C: Compound. When a hand or foot lies alongside the presenting part during childbirth, it is called a compound presentation. This can be a complication as it increases the risk of the presenting part not fitting through the birth canal properly. A: Footling presentation occurs when the baby's foot or feet are the first to emerge from the birth canal. B: Transverse presentation is when the baby is lying sideways in the uterus. D: Cephalic presentation is the ideal position for vaginal delivery, with the baby's head down and ready to be born.