<prompt> Which of the following variabls is measure on ordinal scale-Type of anemiaSeverity of anemiaHemoglobinSerum ferritin  <response>: Scales can be: Qualitative: Categorical scales: Nominal : eg: names of countries . Dichotomous : eg: yesno, presenceabsence. Ordinal : severity of disease: mildmoderatesevere.eg: staging of cancer, kuppusamy socioeconomic class. Quantitative: Metric scales: Interval Ratio 