**Core Concept**
The Employees' State Insurance (ESI) Act is a social security and health insurance scheme for Indian workers. It is a significant legislation that provides financial assistance to employees in case of illness, injury, or death.

**Why the Correct Answer is Right**
The ESI Act was enacted to provide medical care and cash benefits to insured persons in case of sickness, maternity, disability, and death due to employment injury. The Act also provides financial assistance to insured persons in case of unemployment, old age, or any other contingency. The Act was enacted to provide social security to Indian workers and to reduce the burden of medical expenses on employees.

**Why Each Wrong Option is Incorrect**
**Option A:** Incorrect because the ESI Act was not enacted in 1950. Although the Act was amended in 1950, it was originally enacted in 1948.
**Option B:** Incorrect because the ESI Act was not enacted in 1947. 1947 is the year India gained independence, and the ESI Act was enacted a year later.
**Option C:** Incorrect because the ESI Act was not enacted in 1949. Although the Act was amended in 1949, it was originally enacted in 1948.

**Clinical Pearl / High-Yield Fact**
The ESI Act is a significant legislation that provides financial assistance to employees in case of illness, injury, or death. It is essential for medical professionals to be aware of the provisions of the Act to provide appropriate care and support to insured persons.

**Correct Answer: B. 1948**