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Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
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Concentration of methemoglobin to cause cyanosis-
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The correct answer is  Ans. (c) 1.5gm/dl(Ref: Ganong, 25th ed/p.647)The level of methemoglobin producing cyanosis is 1.5gm/dlIf deoxyhemoglobin (reduced Hb) is 5.0g/dL or greater, cyanosis appears