Zero address instruction format is used for
(a) RISC architecture
(b) CISC architecture
(c) Von-Neuman architecture
(d) Stack-Organized architecture
In stack-organized architecture push and pop instruction is required a address field to specify the location of data for pushing into the stack and destination location during pop operation but for logic and arithmetic operation the instruction does not need any address field as it operates on the top two data available in the stack.