The correct answer is: A. Solid state
Solid-state displays are a type of flat-panel display that uses thin-film transistors (TFTs) to control the individual pixels on the screen. TFTs are made of semiconductor material, which allows them to be very thin and lightweight. This makes solid-state displays ideal for use in portable devices such as laptops, tablets, and smartphones.
RBG monitors are a type of cathode ray tube (CRT) display that uses red, green, and blue (RGB) phosphors to create the image on the screen. CRTs are large and heavy, and they require a lot of power to operate. This makes them less than ideal for use in portable devices.
VLSI is a type of integrated circuit that contains a large number of transistors. VLSI is used in a variety of electronic devices, including computers, smartphones, and cars. However, VLSI is not used in flat-panel displays.
Direct view storage tube (DVST) is a type of CRT display that was once used in computer monitors. DVSTs are no longer manufactured, as they have been replaced by newer technologies such as LCD and plasma displays.
In conclusion, the correct answer to the question “What technology is used for flat panel displays?” is A. Solid state.