Consider paging address translation by direct mapping. Given the base address, a$,$ in the page table origin register, virtual address v $=($p$,$ d$)$ and an entry p$($in the page table starting at address a$)$ for the page frame corresponding to virtual page p$,$ what is the real address corresponding to v$?$

p$*$ d

p$$ concatenated with d

$($a $+$ p$)*$ d

$($a $+$ p$)$ concatenated with d