<prompt> In WHO Road to Health chart, upper and lower limit of represents:30 percentile for boys and 3 percentile for girls50 percentile for boys and 3 percentile for girls30 percentile for boys and 5 percentile for girls50 percentile for boys and 5 percentile for girls  <response>: Ans. b. 50 percentile for boys and 3 percentile for girls Ref: Park 23e p545, 20e p547-548In WHO Road to Health chart, upper limit of represents 50th percentile for boys and lower limit represents 3rd percentile for girls.WHO-Home Based Growth ChartWHO growth chart has 2 reference curvesQ:Upper Reference Curve URC: 50th percentile for boysQLower Reference Curve LRC: 3rd percentile for girlsQRoad to HealthSpace between two growth curves weight channel.It includes zone of normality for most populations, i.e. 95 of healthy normal children used as a reference fall in this areaQWHO reference curves are based onQ: NCHS Standards National Centre for Health Statistics, USAThe 3rd percentile LRC corresponds to approximately 2 SD below the median of weight-for-age reference value URCQGrowth ChartsThe growth or read to health chart first designed by David Morely and later modified by WHO is a visible display of the childs physical growth and development.Growth chart is generally plotted between: Weight and AgeQIt is designed primarily for longitudinal follow-up growth monitoring of a child, so that changes overtime can be interpreted.The purpose of the chart is early identification of growth failure so that action can be taken to prevent severe malnutrition.Changes in weight are the most sensitive indicators of growth and nutrition status in young children.Growth chart provides information on Identification and registration Birth date and birth weight Chronological age Weight-for-age Developmental milestones History of sibling health Immunization procedures Introduction of supplementary foods Episodes of sickness Child spacing Contraceptive family planning methods used Reasons for special care 