The correct answer is (d) Modu.
Modu is an operating system developed by India’s Centre for Development of Advanced Computing (C-DAC). It is a Unix-like operating system that is designed for use on super and mini computers. Modu is based on the Linux kernel and includes a number of features that make it suitable for use on high-performance computing systems. These features include support for multiple processors, large memory systems, and high-speed networking. Modu is also available in a number of different versions, each of which is tailored to a specific type of computer system.
C is a programming language that is not an operating system. It is a general-purpose language that can be used to create a wide variety of software applications. Unix is an operating system that is developed by AT&T. It is a multi-user, multi-tasking operating system that is widely used on servers and workstations. Ada is a programming language that is developed by the United States Department of Defense. It is a high-level, object-oriented language that is used to create a wide variety of software applications.