Correct option is B
Solution:
From the table provided:
Number of children with illness in low socio-economic status = 10
Number of children with illness in high socio-economic status = 5

Thus, the ratio of illness between low and high socio-economic status is calculated as:
Information Booster:
1. Respiratory illnesses are often influenced by socio-economic factors such as access to clean air, healthcare facilities, and living conditions.
2. Children from low socio-economic strata are more exposed to pollutants due to substandard housing and environmental conditions.
3. High socio-economic groups often have better access to healthcare, reducing illness prevalence despite sointervention
4. Ratios in such studies help policymakers prioritize resource allocation for vulnerable groups.
5. Surveys using stratified socio-economic data provide insights into targeted health interventions.