- Sunscreen lotions often use nanoparticles of Titanium dioxide (TiO2) and Zinc oxide (ZnO) because they are effective UV filters. Titanium oxide nanoparticles reflect and absorb UV radiation. - Nano silver is widely used in textiles for its potent antimicrobial properties, preventing odour and growth of bacteria. - Optoelectronics, the study and application of electronic devices that source, detect and control light, utilizes various nanomaterials. Quantum dots (II) are semiconductor nanocrystals with unique optical and electronic properties that make them suitable for applications like LEDs, displays, and solar cells within optoelectronics. - High-definition television (HDTV) displays utilize advanced materials for picture quality. Some display technologies, like Quantum Dot LED (QLED) TVs, use quantum dots (II) to produce vibrant colours. However, option C is matched with Quantum dots. Zinc selenide (IV) is a II-VI semiconductor compound used in optoelectronic devices, including blue and green LEDs and laser diodes, which are components in display technologies. Given the other strong matches, D-IV is the most plausible pairing among the options.