**Question:** NFHS-3 -

A. Effect of maternal education on child health
B. Impact of family planning on maternal mortality
C. Role of nutrition in fetal development
D. Influence of wealth index on infant mortality

**Correct Answer:** D. Influence of wealth index on infant mortality

**Core Concept:** Socioeconomic status (SES) is a significant determinant of health outcomes, including infant mortality. The wealth index is a commonly used indicator of an individual's or household's economic status, often derived from information on household assets, characteristics, and living conditions.

**Why the Correct Answer is Right:** The wealth index can reflect the availability of resources and healthcare access for a family or household. In low-resource settings, infants from wealthier families or those living in wealthier households tend to have better access to healthcare, nutrition, and hygiene, which can significantly impact infant survival. Higher wealth index is associated with increased utilization of healthcare services, better nutrition, and improved living conditions, all of which contribute to a lower infant mortality rate.

**Why Each Wrong Option is Incorrect:**

A. Maternal education (Option A) is important for overall health outcomes, but it does not directly address the economic resources available to a family or household, which is the focus of the correct answer.

B. Family planning (Option B) is essential for overall maternal and child health but does not directly address the economic status of a family or household, which is the key determinant of infant mortality in this question.

C. Nutrition (Option C) is a crucial factor in fetal and infant development, but it does not specifically address the economic resources available to a family or household, which is the focus of the correct answer.

**Clinical Pearl:** Understanding the role of socioeconomic factors in health outcomes is essential for healthcare professionals to provide targeted interventions and improve health disparities in underserved populations. Improving socioeconomic status through policies and interventions can have a significant impact on reducing infant mortality rates and enhancing overall health outcomes.