Organic Light Emitting Diodes (OLEDs) are used to create digital display in many devices. What are the advantages of OLED displays over Liquid Crystal displays? 1. OLED displays can be fabricated on flexible plastic substrates. 2. Roll-up displays embedded in clothing can be made using OLEDs. 3. Transparent displays are possible using OLEDs. Select the correct answer using the code given below :

Option (c) is correct because OLEDs are self-emissive and do not require a backlight, allowing them to be printed on thin, flexible plastic or transparent substrates for rollable and see-through applications. Option (a) is a common wrong choice if one doubts the practical feasibility of "roll-up displays in clothing," yet the polymer-based nature of OLEDs specifically enables integration into flexible textiles. The core concept tested is the structural versatility of organic light-emitting materials compared to the rigid, multi-layered requirements of traditional Liquid Crystal Displays (LCDs).