**Core Concept**
The question is testing the principle of Compton scattering, a phenomenon in physics where X-ray photons scatter off electrons in a material, leading to a loss of energy and a change in direction. This is an essential concept in radiology, where the scattering of X-rays affects the quality of the radiographic image.

**Why the Correct Answer is Right**
Compton scattering occurs when a high-energy photon collides with a relatively slow-moving electron. The photon transfers some of its energy to the electron, causing the photon to change direction and lose energy. The maximum scattering occurs when the photon's energy is similar to that of the electron, resulting in a significant transfer of energy and a large change in direction. This phenomenon is responsible for the fogging of X-ray images, particularly in areas with high atomic numbers, such as the lungs.

**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because Compton scattering is not related to the absorption of X-rays, which is a different phenomenon.
* **Option B:** This option is incorrect because Compton scattering is not a result of the interaction between X-rays and the atomic nucleus, but rather with the electrons.
* **Option C:** This option is incorrect because Compton scattering does not occur in the absence of electrons, which are necessary for the scattering process to occur.

**Clinical Pearl / High-Yield Fact**
To remember the concept of Compton scattering, recall that it occurs when X-ray photons collide with electrons, resulting in a loss of energy and a change in direction. This is why X-ray images often appear foggy in areas with high atomic numbers, such as the lungs.

**Correct Answer: B. Compton scattering occurs when X-ray photons collide with electrons, resulting in a loss of energy and a change in direction.**