Final answer:
Rib instruments are necessary for a Thoracotomy, which requires access to the thoracic cavity, unlike the abdominal surgeries listed in the other options.
Step-by-step explanation:
Rib instruments should be available for Option 2: Thoracotomy. A thoracotomy is a surgical procedure that involves making an incision into the chest wall to gain access to the thoracic organs, including the lungs and heart. Unlike the procedures listed in Options 1 (Hysterectomy), 3 (Cholecystectomy), and 4 (Appendectomy), which pertain to the abdominal cavity, a thoracotomy deals with the thoracic cavity where the ribs need to be spread apart to provide access to the surgeon. Therefore, rib instruments such as rib spreaders, rib shears, and rib retractors are essential to safely expose and work within the thoracic cavity.However, rib instruments are not usually necessary for procedures such as hysterectomy, cholecystectomy, or appendectomy. These procedures involve different areas of the body and do not typically require access or manipulation of the ribs.