The correct option is "1, 2 and 3" because OLED technology offers superior versatility compared to Liquid Crystal Displays (LCDs). OLEDs have the ability to be produced on flexible substrates, allowing for innovative applications such as roll-up displays integrated into clothing and transparent displays that can be used in various contexts, from automotive to architectural lighting. These characteristics stem from the self-emissive nature of OLEDs, which do not require a backlight and can thus provide greater design flexibility, lower power consumption, and improved image quality, making them advantageous for modern digital display applications—key themes aligned with advancements in technology and material science often highlighted in UPSC syllabus.