Which of the following pair of acronym and its expansion are incorrectly matched?

Correct option is C

(a) LED-Light Emitting Diode (Correct): LED stands for Light Emitting Diode. LEDs are semiconductor devices that emit light when an electric current passes through them. They are commonly used in various applications such as indicators, displays, and lighting.
(b) CRT-Cathode Ray Tube (Correct): CRT stands for Cathode Ray Tube. CRTs are vacuum tubes that use electron beams to create images on a fluorescent screen. They were commonly used in older television sets and computer monitors.
(c) LCD-Liquid Control Display (Incorrect): LCD actually stands for Liquid Crystal Display. LCDs use liquid crystal molecules to control the passage of light through them, thus creating images. They are commonly used in modern electronic devices such as smartphones, tablets, and flat-screen monitors.
(d) VDU-Video Display Unit (Correct): VDU stands for Video Display Unit. It refers to a device that displays video and graphics output from a computer. This term is synonymous with a computer monitor or display screen.