0 votes 0 votes Q. The part of the operating system manages the essential peripherals , such as keyboard , screen , disk drives , and parallel and serial ports . options A . Basic I/O System B. Secondary I/O System C. Peripherals I/O System D. Marginal I/O System Lokesh Arya asked Aug 18, 2018 Lokesh Arya 112 views answer comment Share Follow See all 0 reply Please log in or register to add a comment.