## Core Concept
Radiation protection principles are designed to minimize exposure to ionizing radiation. The basic principles include **justification**, **optimization** (also known as **ALARA**: As Low As Reasonably Achievable), and **limitation** of doses to individuals. These principles are fundamental in ensuring safety in medical, industrial, and research settings where radiation is used.

## Why the Correct Answer is Right
The principle of **optimization** (or **ALARA**) ensures that radiation doses are kept as low as reasonably achievable for the purpose at hand, considering economic and societal factors. **Limitation** sets dose limits to protect individuals from the harmful effects of radiation. **Justification** ensures that any use of radiation for medical purposes is justified, meaning the benefits outweigh the risks. These are core to radiation protection.

## Why Each Wrong Option is Incorrect
- **Option A:** Justification is indeed a basic principle as it ensures that any exposure to radiation has a valid reason and that the benefits outweigh the risks.
- **Option B:** Optimization (or ALARA) is a principle aimed at minimizing radiation exposure.
- **Option D:** Limitation refers to the dose limits set for individuals to protect them from radiation harm.

## Clinical Pearl / High-Yield Fact
A key point to remember is the **ALARA** principle, which is crucial in medical imaging and radiation therapy to minimize patient and staff exposure. This principle guides the selection of imaging protocols and radiation doses.

## Correct Answer Line
**Correct Answer: D. Limitation is indeed one, but assuming D is incorrect based on standard principles, if D states something not aligned with justification, optimization, or ALARA, it could be right. Assuming a common incorrect option:** **Correct Answer: D.**