The Correct answer is LynxOS.LynxOS?:It is a real-time operating system.A real-time operating system is an operating system intended to serve real-time applications that process data as it comes in, typically without buffer delays.A real-time system is a time-bound system that has well defined fixed time constraints.It does not use on mobile phones.LynxOS is a multi-core hard real-time operating system for embedded devices in avionics, automotive.It was developed by Lynx Software Technologies in 1986.?Additional InformationAndroid: is a Linux based operating system that is designed for touch screen mobiles (tablets, smartphones). iOS: It is an operating system used in iPhones, developed by Apple.Blackberry: It is a graphical user interface based operating system.