Correct Answer: D

Rationale: Maternal smoking during pregnancy can affect fetal development in multiple ways. Smoking can cause low birth weight by restricting oxygen and nutrients to the fetus, leading to growth issues. It can also increase the risk of preterm birth due to the harmful chemicals in cigarette smoke. Furthermore, smoking can affect lung development in the fetus, leading to respiratory issues. Therefore, the correct answer is D - All of the above, as maternal smoking can have a comprehensive impact on fetal development, including low birth weight, preterm birth, and lung development issues.

Correct Answer: A

Rationale: The correct answer is A because in Cushing's syndrome, there is excess cortisol production leading to hyperglycemia (high glucose) and hypokalemia (low potassium). The high white blood cell count is due to the immunosuppressive effects of cortisol. Option B is incorrect as polycythemia is not typically seen in Cushing's syndrome. Option C is incorrect as low sodium and low potassium are not common findings in Cushing's syndrome. Option D is incorrect as high sodium, high chloride, and high RBCs are not typical features of Cushing's syndrome.

Correct Answer: D

Rationale: The correct answer is D (42 completed weeks) because a full-term pregnancy is considered to be around 40 weeks. Post maturity refers to a pregnancy that has exceeded the normal 40-week gestation period. At 42 weeks, the risk of complications such as stillbirth or issues with the placenta increases. Choice A (40 completed weeks) is incorrect because this is considered a full-term pregnancy. Choices B (38 completed weeks) and C (41 completed weeks) are incorrect as they do not meet the criteria for post maturity.

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: D

Rationale: The correct answer is D because all the choices (A, B, and C) are risks associated with cesarean sections. Infection can occur at the incision site, blood loss is a common concern during surgery, and cesarean sections typically have a longer recovery time compared to vaginal delivery. Therefore, all of these risks are potential complications of undergoing a cesarean section. The other choices (A, B, and C) are incorrect individually because they only represent a subset of the risks associated with cesarean sections, while choice D encompasses all potential risks.