Final answer:
To listen to the heart of a neonate in LOA position, the stethoscope should be placed in the left lower abdomen due to the orientation of the fetus's heart with respect to its position in the womb.
Step-by-step explanation:
To listen to the heart of a neonate in the Left Occiput Anterior (LOA) position, the stethoscope should be placed in the left lower abdomen. This is based on the knowledge that during fetal development, the heart is located in the chest area, specifically within the thoracic cavity. The heart's apex, which is the inferior tip, lies slightly to the left of the sternum, at the level of the junction between the fourth and fifth ribs close to where they join with the costal cartilages. Given the LOA position of the fetus, the best area to auscultate would be the side where the back (posterior) of the neonate is directed, which in LOA is the left side. Hence, it would be most appropriate to listen to the heart in the lower quadrant of the abdomen that is closest to the fetal back, which is option D. Left lower abdomen.