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:

1. Statement 1 is correct. Unlike Liquid Crystal Displays (LCDs) which require a rigid backlight, OLED pixels emit light themselves. This allows OLED displays to be fabricated on flexible plastic substrates, offering significant design versatility. 2. Statement 2 is correct. The ability to build OLEDs on flexible substrates directly enables the creation of novel form factors like roll-up displays. Such displays could potentially be embedded in clothing or other non-rigid surfaces. 3. Statement 3 is correct. The constituent layers of an OLED can be made transparent when turned off. This makes it possible to create transparent displays where one can see through the screen, an application difficult to achieve with traditional LCD technology due to its multiple layers including the backlight. 4. All three are recognized advantages of OLED displays over Liquid Crystal displays.