General Medicine General b00c60fb All true about accidental intra aerial injection of Thiopentone except:- A Immediate intense vasoconstriction and excruciating pain B Cause is precipitations of thiopental crystals in the aerial vassals C To relieve pain we have to immediately remove the misplaced aerial cannula. D Sympathectomy of the upper extremity produced by Stellate ganglion block may relieve vasoconstriction.