Final answer:
Methaemoglobinaemia is a condition where the iron in hemoglobin is oxidized to the ferric state, resulting in anemia and hypoxia. It is not caused by certain drugs and chemicals mentioned in the question.
Step-by-step explanation:
Methaemoglobinaemia is not caused by A. prilocaine, B. GTN, C. SNP, D. ?, E. ?
Methaemoglobinaemia is a condition where the iron in hemoglobin is oxidized to the ferric state, rendering it unable to bind oxygen. It leads to anemia and hypoxia. The condition is caused by various factors, including exposure to certain drugs and chemicals, such as ferricyanide, nitrite, quinines, hydroxylamines, acetanilide, and sulfonamides. It is not caused by prilocaine, GTN, or SNP, and the answer to option D and E is not provided in the question.