The correct answer is: A. Base address of each frame and corresponding page number.
A page table is a data structure in computer operating systems used to map virtual memory addresses to physical memory addresses. It is a table that stores the mapping of virtual addresses to physical addresses. The base address of each frame is the starting address of that frame in physical memory. The corresponding page number is the number of the page in virtual memory that is mapped to that frame in physical memory.
The other options are incorrect because they do not describe what is contained in a page table. Option B is incorrect because it does not include the base address of each frame. Option C is incorrect because it does not include the page number. Option D is incorrect because it is not a valid option.