Final answer:
To reduce back strain while transferring patients, none of the given options are recommended. Safe lifting techniques, such as bending at the knees and keeping the back straight, should be used. Additional staff or assistive devices can further minimize strain.
Step-by-step explanation:
To reduce back strain associated with transferring patients from stretcher to x-ray table, the best practice is to use safe lifting techniques. These techniques typically involve keeping the patient close to your body, bending at the knees, keeping your back straight, and using your legs to lift, rather than bending at the waist. Thus, none of the options (a, b, c, d) given directly correspond to the safest method known as 'lifting with your legs' and maintaining a straight back. When available, using assistive devices or having additional personnel to help can also reduce the risk of injury.
Figure 9.30 and Example 9.5 from the given references emphasize the importance of body mechanics and maintaining balance by adjusting the position of the center of gravity (cg) when carrying loads. These principles should be applied when transferring patients as well. While the specific methods described in the options are not recommended, the underlying concept is to prevent back strain by avoiding positions that place undue stress on the back muscles and spine.