Final answer:
To demonstrate the axillary ribs of the left thorax, the appropriate positions are the Left Anterior Oblique (LAO) and the Left Posterior Oblique (LPO). These positions help separate the ribs for a clearer radiographic image.
Step-by-step explanation:
The positions that can be used to demonstrate the axillary ribs of the left thorax are the Left Anterior Oblique (LAO) and the Left Posterior Oblique (LPO). In an LAO position, the patient's left side is closest to the x-ray film, and part of the left side of the body is angled forward, which opens up the spaces between the ribs on the left side allowing for a clearer view. Conversely, the LPO position demonstrates the left axillary ribs by having the patient's back closest to the film with the left side of the body angled toward the film, which also helps spread the ribs apart in the area of interest. Among the given options, -2 and 4 only correctly identifies these two oblique positions: LAO and LPO.