**Core Concept:**
The question is about calculating the number of Anganwadi centers needed for a given population in a rural area, based on the revised norms. An Anganwadi center is a preschool and primary health care system in India for children under six years and pregnant and lactating women. The goal is to ensure proper nutrition and healthcare to these vulnerable groups.

**Why the Correct Answer is Right:**
The correct answer is derived from the revised norms provided by the Ministry of Women and Child Development, India. According to the norms, 1 Anganwadi center is required for every 1,000 people in a rural area. So, for a population of 1,950 people, we would divide the total population by the standard number of people per center:

1. Calculate the number of groups: 1,950 / 1,000 = 1.95 groups
2. Round up to the nearest whole number because we cannot have a fraction of a group
3. Therefore, we would need 2 Anganwadi centers for a population of 1,950 people in a rural area.

**Why Each Wrong Option is Incorrect:**

A. This option is incorrect because we cannot have a fraction of a center, as Anganwadi centers must serve whole groups of people.

B. This option is wrong because it is a lower number than the required number calculated above.

C. This option is incorrect for the same reason as B, as it provides a lower number than the calculated requirement.

D. This option is incorrect for the same reason as A, B, and C, as it suggests having a fraction of a center, which is not feasible.

**Clinical Pearl:**
In a rural area with a population of 1,950 people, it is essential to have 2 Anganwadi centers to ensure proper healthcare and nutritional services for the children and pregnant and lactating women. This ensures a better health outcome and early childhood development for these vulnerable groups.