we know that maximum possible size of file depend on the size of the blocks, the number of blocks used for the index, and the size of the address of the blocks.
so option A is incomplete
both option A and option D combine form the correct answer
because
Size of File = No of block addresses available for addressing one file * size of block
and from option A we can only calculate only no of addressable block
can anybody tell me what i am doing wrong ??