Answer:
Tobias is most likely brain dead.
Step-by-step explanation:
The thalamus is the small organ located at the base of brain and are surrounded by the ventricles. The thalamus helps in the function of the relay signalling.
The damage in the thalamus affects the signaling of the brain. This might also cause the retrograde amnesia. This might also cause impairment in the body and if the thalamus is completely damaged, the individual can be declared as the brain dead.
Thus, the correct answer is option (c).