CRT stands for?

• A. Cathode Ray Tube
• B. Cathode Ray Transmitter
• C. Cathode Radiation Tube
• D. Central Ray Tube

Answer: (A)

The main idea is naming the classic display device used in older TVs and computer monitors. CRT stands for Cathode Ray Tube, which is a vacuum tube where a heated cathode emits electrons that form a beam (the cathode ray). This beam is steered so it hits a phosphor-coated screen, creating images.

That’s why the phrase Cathode Ray Tube is the best answer: it directly describes the two key elements (cathode and ray) and the type of component (a tube). The other options don’t fit because they use terms that don’t describe this device: a transmitter implies sending out signals, which isn’t what CRT names; a radiation tube isn’t the standard term for this display device; and Central Ray Tube isn’t a recognized term in this context.