During the assessment of a laboring client, the nurse notes that the FHT are loudest in the upper-right quadrant. The infant is most likely in which position? A. Right breech presentation B. Right occipital anterior presentation C. Left sacral anterior presentation D. Left occipital transverse presentation

First, we need to understand the different fetal positions mentioned in the exercise. Let's break down each position: A. Right breech presentation - The baby's buttocks (or possibly feet) are positioned to be delivered first, and the baby is facing towards the mother's right side. B. Right occipital anterior presentation - The baby's head is positioned to be delivered first, with the back of the head (occiput) facing the mother's right side and towards her front (anterior). C. Left sacral anterior presentation - The baby's buttocks (sacrum) are positioned to be delivered first, and the baby is facing towards the mother's left side and towards her front (anterior). D. Left occipital transverse presentation - The baby's head is positioned to be delivered first, with the back of the head (occiput) facing the mother's left side and towards her side (transverse).

Given that the fetal heart tones (FHT) are loudest in the upper-right quadrant, this means that the baby's heart/chest is likely facing the mother's upper-right side.

Now we will compare the FHT location to the positions of the baby in each option: A. Right breech presentation - The baby's buttocks/feet are towards the mother's right side. This does not coincide with the FHT position in the upper-right quadrant. B. Right occipital anterior presentation - The baby's head is towards the mother's right side and front. This would mean the baby's chest (and heart) is also facing the upper-right quadrant, so this position is a possible match for the FHT location. C. Left sacral anterior presentation - The baby's buttocks are towards the mother's left side. This does not coincide with the FHT position in the upper-right quadrant. D. Left occipital transverse presentation - The baby's head is towards the mother's left side. This does not coincide with the FHT position in the upper-right quadrant.

Based on the analysis of each fetal position, only the Right occipital anterior presentation (option B) matches the location of the loudest FHT in the mother's upper-right quadrant. Therefore, the infant is most likely in Right occipital anterior presentation. The correct answer is (B).