**Core Concept**
Light rays and X-rays are forms of electromagnetic radiation, which are waves that propagate through a medium. They have distinct properties, but share some similarities in their behavior due to their electromagnetic nature.

**Why the Correct Answer is Right**
The correct answer is related to the property of electromagnetic waves, specifically the electromagnetic spectrum. Both light rays and X-rays belong to the electromagnetic spectrum and exhibit similar characteristics, such as diffraction, interference, and refraction. They also have a frequency and wavelength, which are inversely related.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because light rays and X-rays have different frequencies and wavelengths, which affect their interaction with matter. Light rays are visible to the human eye, while X-rays are ionizing radiation with higher frequencies.

**Option B:** This option is incorrect because the behavior of light rays and X-rays in matter is different due to their varying frequencies and wavelengths. Light rays are refracted, reflected, and absorbed by materials, whereas X-rays are more easily absorbed and scattered by denser materials.

**Option C:** This option is incorrect because the energy of light rays and X-rays is different, with X-rays having higher energy due to their higher frequencies.

**Clinical Pearl / High-Yield Fact**
It's essential to remember that the electromagnetic spectrum includes various types of radiation, ranging from low-energy radio waves to high-energy gamma rays. Understanding the properties of electromagnetic waves is crucial for medical imaging modalities like X-ray, CT scans, and MRI.

**Correct Answer:** A. They have same electromagnetic nature.