The correct answer is option 3. Operating System (OS) An Operating System (OS) is an interface between a computer user and computer hardware. It is software that performs all the basic tasks like file management, memory management, process management, handling input and output, and controlling peripheral devices such as disk drives and printers. It manages computer hardware, software resources, and provides common services for computer programs. There are different types of OS Batch OS Multiprogramming Multitasking Multiprocessing Real-time The main task an operating system carries out is the allocation of resources and services, such as the allocation of memory, devices, processors, and information. The program to select appropriate translators requested is up to the user not by the operating system. So, the correct statements are i, ii, iii only Additional Information Translator program There are 3 different types of translators as follows: Compiler. A compiler is a translator used to convert high-level programming language to low-level programming language. ... Interpreter. Just like a compiler, is a translator used to convert high-level programming language to low-level programming language. ... Assembler is used to translate the program written in Assembly language into machine code