<prompt> All are true about Thiopentone except:NaHCO3 is a preservativeContraindicated in PorphyriaAgent of choice in shockHas cerebroprotective action  <response>: C i.e. Agent of choice in shock Thiopentone, a pale yellow powder, is ultrasho acting smooth inducing agent because of rapid redistributionQ. It is used in 2.5 conc. at 2.5 - 4.5 mgkg mixed with 6 anhydrous Na2CO3 as perservativeQ Thiopentone is contraindicated in porphyria, status asthmaticus, severe shock, pericardial temponade and uncompensated myocardial diseaseQ 