If it’s chemistry then In chemistry, a solution is a special type of homogeneous mixture composed of two or more substances. In such a mixture, a solute is a substance dissolved in another substance, known as a solvent.
A mixture is the physical combination of two or more substances in which the identities are retained and are mixed in the form of solutions. A solution is a homogeneous mixture of two or more substances. A solution consists of a solute and a solvent. The solute is the substance that is dissolved in the solvent.
The correct answer is option B. X-rays are the waves found in the electromagnetic spectrum at a wavelength of 1x10^-11 - 1x10^-8 m and frequencies of 3x10^16 to 3x10^19 Hz. These waves penetrate easily through certain materials which made them usefule in the field of medicine.