C

Step 1: Understanding the generation of X-rays involves knowledge of electron interactions. X-rays are produced when high-energy electrons collide with heavy metal targets, such as tungsten.

Step 2: The process involves the following steps:
1. Electrons are accelerated to high speeds using a high-voltage power supply.
2. These fast-moving electrons are directed towards a heavy metal target.
3. Upon collision with the target, the electrons lose energy very rapidly, and this energy is released in the form of X-rays.

Step 3: This process is known as 'Bremsstrahlung' radiation, which is the primary mechanism for X-ray production in laboratories.

Conclusion: Option C accurately describes the method by which X-rays are generated in a laboratory setting.