Correct Answer: B

Rationale: A surge of energy is a common sign that precedes labor. This burst of energy, often referred to as the 'nesting instinct,' is believed to occur as the body prepares for labor, prompting the individual to undertake tasks to prepare for the arrival of the baby. Decreased vaginal discharge is not a typical sign preceding labor. Urinary retention is not a sign that precedes labor and may indicate another issue. Weight gain of 0.5 to 1.5 kg is not a specific sign of impending labor.

Correct Answer: D

Rationale: Abruptio placentae is the premature separation of the placenta from the uterine wall, which can cause continuous abdominal pain and vaginal bleeding. In this scenario, the client's symptoms of sudden abdominal pain and vaginal bleeding are indicative of abruptio placentae, which requires immediate medical attention to prevent potential complications for both the client and the fetus. Placenta previa is characterized by painless vaginal bleeding in the third trimester, not sudden abdominal pain. Prolapsed cord presents with visible umbilical cord protruding from the vagina and is not associated with abruptio placentae symptoms. Incompetent cervix typically manifests as painless cervical dilation in the second trimester, not sudden abdominal pain and bleeding as seen in abruptio placentae.

Correct Answer: D

Rationale: At 0 station, the lowermost portion of the fetus is at the level of the ischial spines, indicating that the presenting part of the baby has engaged in the pelvis. This position is a significant milestone in labor progress and suggests that the baby is descending into the birth canal for delivery. Choices A, B, and C are incorrect. Choice A refers to the fetal head position, choice B describes the largest fetal diameter passing through the pelvic outlet (which is not related to station), and choice C refers to the palpability of the posterior fontanel (which is not relevant to station in labor).

Correct Answer: A

Rationale: The correct answer is A: Perform a sharp hand clap near the infant. The Moro reflex, also known as the startle reflex, is elicited by a sudden stimuli such as a sharp hand clap near the infant. This reflex is characterized by the infant's arms extending and then flexing with a distinctive 'startle' motion. It is a normal and expected reflex in newborns, typically disappearing by 3-6 months of age. Choices B, C, and D are incorrect because they do not elicit the Moro reflex; holding the newborn vertically (choice B) or placing a finger at the base of the newborn's toes (choice C) are associated with other reflexes, while turning the newborn's head quickly to one side (choice D) is related to the tonic neck reflex.

Correct Answer: A

Rationale: The yellow skin observed in the newborn suggests jaundice. Maternal/newborn blood group incompatibility is a common cause of jaundice in newborns. This occurs when the mother and baby have different blood types, leading to the baby's immune system attacking the red blood cells, causing jaundice. Physiologic jaundice, which is a normal process due to the breakdown of red blood cells in newborns, typically presents after the first 24 hours of life. Absence of vitamin K leads to bleeding issues, not jaundice. Maternal cocaine abuse does not directly cause jaundice in newborns.