Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) autosomal recessive congenital methemoglobinemia ?
    ### Response:
    Autosomal recessive congenital methemoglobinemia is an inherited condition that mainly affects the function of red blood cells. Specifically, it alters a molecule within these cells called hemoglobin. Hemoglobin carries oxygen to cells and tissues throughout the body.
    