Madness is the obvious answer, then there are hysteria, delusion, extreme hypochondria, catatonia, to name a few.
A neurological disorder marked by sudden recurrent episodes of sensory disturbance, loss of consciousness, or convulsions, associated with abnormal electrical activity in the brain.
Option A will only work if the sentence was "Each size of a pallet is approximately as large as the size of a refrigerator..."
