The operating system maintains a __ table that keeps track of how many frames have been allocated, how many are there, and how many are available.

 a) memory
b) mapping
c) page
d) frame

frame table is a data structure used by the operating system to keep track of physical memory frames. It contains information about the status of each frame, such as whether it’s free or allocated to a process, and if allocated, which page is currently stored in it. This information is crucial for memory management and page replacement algorithms.