**Core Concept**
Disability limitation refers to the process of minimizing the impact of a disease or injury on a patient's physical function and preventing further decline or complications. This involves taking measures to reduce the severity of symptoms, prevent deformities, and maintain optimal physical function.

**Why the Correct Answer is Right**
Resting affected limbs in a neutral position is an example of disability limitation as it helps to prevent further injury or damage to the affected area. By keeping the limbs in a neutral position, the patient can reduce muscle fatigue, prevent contractures, and maintain optimal joint mobility. This is particularly important in conditions such as polio, where muscle weakness and paralysis can lead to contractures and deformities if not properly managed.

**Why Each Wrong Option is Incorrect**
**Option A:** Reducing the occurrence of polio by immunization is an example of primary prevention, which involves preventing the disease from occurring in the first place. While immunization is an effective way to prevent polio, it is not an example of disability limitation.
**Option C:** Providing calipers for walking is an example of rehabilitation, which involves helping patients to regain their physical function and independence. While calipers can be an important assistive device for patients with mobility impairments, they are not an example of disability limitation.
**Option D:** Arranging for schooling of a child suffering from PRPP is an example of social rehabilitation, which involves helping patients to reintegrate into their community and society. While education is an important aspect of rehabilitation, it is not an example of disability limitation.

**Clinical Pearl / High-Yield Fact**
It's essential to note that disability limitation should be distinguished from primary prevention, which aims to prevent the disease from occurring in the first place. Disability limitation focuses on minimizing the impact of a disease or injury once it has occurred, whereas primary prevention aims to prevent the disease from occurring altogether.

**✓ Correct Answer: B. Resting affected limbs in neutral position**