<prompt> Which of the following anaesthesia will produce decreased EEG activitiesHypothermiaEarly hypoxiaKetamineN2O  <response>: Activation of EEG :- Inhalational agent subanesthetic doses, Barbiturates small dose, Benzodiazepines small doses, Etomidate small doses, Nitrous oxide, Ketamine, Mild hypercapnia, Sensory stimulation, Hypoxia early.Depression of EEG :- Inhalational agents 1-2 MAC, Barbiturates, opioids, propofol, etomidate, hypocapnia, marked hypercapnia, Hypothermia, Ischemia, Hypoxia late. 