Platypelloid pelvis
Correct Answer: A
Rationale: A platypelloid pelvis is characterized by a flat shape with a shortened anteroposterior diameter, which can impede fetal descent during labor. This pelvic type is associated with an increased risk of dystocia, which is difficulty in childbirth due to inadequate progress of labor. The flat shape of the pelvis may lead to improper positioning of the baby, making it challenging for the fetus to navigate through the birth canal. This can result in prolonged labor, increased risk of birth injuries, and potential complications for both the mother and the baby. In some cases, it may necessitate interventions such as labor induction or cesarean delivery to ensure a safe outcome for the mother and the baby.