A computer has 40 bit instruction code . It uses one register operand and one memory operand .There are 128 general purpose regsiters and 256 M bytes of RAM
If there are n 2 address operations which uses both register and memory then how many one address operations are possible
a) (16-n)x 2^7 b)(32-n)x 2^6 c)64x 2^18 d)none