Correct Answer: D

Rationale: The correct answer is D, complete rupture of the uterus. This is an obstetric emergency due to the risk of severe bleeding and potential harm to both the mother and the fetus. A ruptured uterus can lead to life-threatening complications such as hemorrhage and shock. In contrast, options A, B, and C are not considered obstetric emergencies. Aftercoming head in breech, complete cephalic presentation, and complete breech presentation are normal variations in labor that do not typically require immediate intervention like a ruptured uterus does.

Correct Answer: D

Rationale: The correct answer is D, as all three choices are key indicators for cesarean section during labor. Fetal distress indicates the baby is not tolerating labor well. Failure to progress may lead to complications for the mother or baby. Breech presentation increases the risk of complications during vaginal delivery. Therefore, all three indicators warrant consideration for a cesarean section to ensure the safety of both the mother and the baby.

Correct Answer: B

Rationale: The correct answer is B: Escherichia coli. Puerperal sepsis is often caused by endogenous bacteria from the mother's own flora. E. coli is a common endogenous bacteria found in the gastrointestinal tract and can cause infection during childbirth. Chlamydia trachomatis is a sexually transmitted infection, not typically associated with puerperal sepsis. Clostridium tetani causes tetanus, not puerperal sepsis. Pseudomonas aeruginosa is an environmental pathogen, not typically an endogenous cause of puerperal sepsis.

Correct Answer: D

Rationale: Rationale: 1. Obstructed labor can lead to prolonged pressure on the uterus, causing hemorrhage and uterine rupture (A). 2. Prolonged labor can result in fetal distress due to reduced oxygen supply and potential infection (B). 3. Therefore, both complications mentioned in A and B can occur in obstructed labor. Summary: A: Incorrect - Preterm birth and asphyxia are not directly related to obstructed labor. B: Incorrect - Only fetal distress and infection are commonly associated with obstructed labor. C: Incorrect - Both A and B are possible complications of obstructed labor, making D the correct choice.

Correct Answer: B

Rationale: The correct answer is B: Mauriceau-Smellie-Veit. This method involves flexing the hips, extending the thighs, and applying suprapubic pressure to deliver the head in a complete breech presentation. This technique helps to avoid hyperextension of the neck and potential spinal cord injury. The Lovset maneuver (A) is used for delivering the arms in a breech presentation. The Burns Marshall method (C) involves performing an episiotomy and delivering the baby by flexion and traction on the legs. Gentle traction of the neck (D) is not recommended as it can cause spinal cord injury. Mauriceau-Smellie-Veit is the preferred method for safe delivery of the head in a complete breech presentation.