Final answer:
The recommended position for postural drainage of the right middle lobe - anterior lung segment in an adult is Left Side-Lying.
Step-by-step explanation:
The recommended position for postural drainage of the right middle lobe - anterior lung segment in an adult is B) Left Side-Lying.
When in the left side-lying position, the right middle lobe will be in the uppermost position, allowing gravity to aid in the drainage of secretions from that specific lung segment. This position helps to ensure effective airway clearance and improve respiratory function.
It's important to note that postural drainage techniques should be performed under the guidance of a healthcare professional who can assess the patient's specific needs and provide appropriate instructions and precautions.