Final answer:
The split brain patients have a disconnect between the two hemispheres due to the cut corpus callosum. The right hemisphere processes information from the left visual field, but cannot communicate with the left hemisphere's speech center. However, the patient's left hand, controlled by the right hemisphere, can still carry out instructions related to the object in the left visual field.
Step-by-step explanation:
The correct answer is b) The Corpus Callosum.
Split brain patients have had their corpus callosum cut, which severs communication between the two hemispheres of the brain. In these patients, the left hemisphere is responsible for verbal communication, while the right hemisphere is responsible for nonverbal functions. When an object is presented to the patient's left visual field, the information is processed by the right hemisphere and cannot be verbally identified due to the lack of communication with the speech center in the left hemisphere. However, the patient's left hand, which is controlled by the right hemisphere, can still carry out instructions related to the object.