Final answer:
Cingulotomy is a surgical treatment primarily utilized for obsessive-compulsive disorder (OCD), particularly when other treatments have failed.
Step-by-step explanation:
Cingulotomy is a treatment used primarily for obsessive-compulsive disorder (OCD), which is indicated in choice C. This surgical procedure involves creating lesions in the cingulate gyrus of the brain to alleviate severe symptoms of OCD. It's a form of psychosurgery and is often considered when other treatments like psychotherapy, electroconvulsive therapy, deep-brain stimulation, and medications such as selective serotonin reuptake inhibitors have failed. While cingulotomy is less commonly performed today, it represents a last-resort option for those with intractable OCD.