Akinesia (hypoactivity) and mutism is a feature of
Akinesia + Mutism is a feature of stupor, which is seen in catatonic schizophrenia or catalepsy.
Option c : Cataplexy is sudden loss of muscle tone seen in Norcolepsy, which is not a correct answer.
Twillight state
Stupor
Cataplexy
Torpor