General Medicine General 501d0c56 Ramesh, 30 yrs old male, the diagnosed case of CO poisoning presented with syncope or coma with intermittent convulsions, rapid respirations, tachycardia with a weak pulse and pink or red discoloration of the skin. Estimated percentage of COHb is A 30 to 40 % B 40 to 50 % C 50 to 60 % D 60 to 70 %