**Core Concept:** Infant Mortality Rate (IMR) is a measure of child mortality in a country, calculated as the number of deaths per 1,000 live births. It is an important indicator of a country's healthcare system and overall development.

**Why the Correct Answer is Right:** The correct answer refers to the state with the lowest infant mortality rate. Generally, developed countries tend to have lower IMRs due to better healthcare infrastructure, access to healthcare services, and overall socioeconomic development. In this case, the correct answer is **D**.

**Why Each Wrong Option is Incorrect:**

A. Option A refers to a different state or country, so we cannot determine the IMR based on this option.
B. Option B is incorrect because it is a different state or country, and we need to find the state with the lowest IMR.
C. Option C is incorrect because it is a different state or country, and we need to find the state with the lowest IMR.

**Clinical Pearl / High-Yield Fact:**

**Clinical Pearls:**
1. IMR is an important indicator of a country's healthcare system and overall development.
2. To improve IMR, focus on reducing preventable causes of infant mortality, such as maternal health, neonatal infections, and malnutrition.
3. Investing in healthcare infrastructure and access to healthcare services can lead to lower IMRs and overall better public health outcomes.

**Correct Answer:** The state with the lowest infant mortality rate is **D**. To find the correct answer, one must search for the state with the lowest IMR among the options provided.