Final answer:
The normal range of relative lymphocyte count in a 1-year-old should be approximately 20-40% of the total white blood cell count. However, specific range values for this age group are not provided; hence, an accurate selection from the options cannot be given without consulting a medical guideline or pediatric textbook.
Step-by-step explanation:
The question regards the normal range of relative lymphocyte count in a 1-year-old child. Lymphocytes are a type of white blood cell essential for the immune response. In children, the total white blood cell count generally considered healthy ranges from 3.5 to 11 x 10⁹ cells/L. Considering lymphocytes make up approximately 20-30% of the total leukocytes, the normal range of a relative lymphocyte count in a 1-year-old could vary greatly.
Given the provided options, the percentages expressed in the last set of options indicate various conditions but do not directly provide a clear normal range for lymphocyte counts. Without specific normal range data for a 1-year-old provided, options 1 (1.1), 2 (2.27), 4 (4.50), and a range 3 (3.35-50), are not giving precise relative lymphocyte counts. However, typically, the normal range for lymphocytes as a percentage of total white blood cells in children can be approximated to 20-40% based on age and standard clinical ranges.
Thus, without the exact range from a trusted medical source for the age group, a direct answer from the provided options cannot be confidently provided. For the most accurate information, a pediatric textbook or medical guideline should be consulted.