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I believe the answer is: occipital lobe
occipital lobe is the center of visual processing that exist within our brain. When people obtain an input from our visual sensory, we will send it to the occipital lobe and the input would be processed in and resulted in the awareness of what the object is. Damages in this area would make people falsely interpret what they see with another object.
You can search on google it helps
Mina is probably diagnosed and suffers from the disorder of seasonal affective disorder which is letter c in the choices above. It is because a person with seasonal affective disorder is usually treated and undergoes to light therapy and takes antidepressant in which Mina has been given by her doctor.
