A $2-$way set associative mapped cache of size $16KB$ with block size $256$ bytes. The size of main memory is $128KB.$ What is the size of tag directory? note: size directory is the total space used for the tag bit in the cache.

Select one:

a$.32$ bytes

b$.8$ bytes

C$.64$ bytes

Direct Mapping Cache Organization

d$.16$ bytes

e$.$ none