The Reduced Instruction Set Computer $($RISC$)$ characteristics are:
(a) Single cycle instruction execution
(b) Variable length instruction formats
(c) Instructions that manipulates operands in memory
(d) Efficient instruction pipeline

Choose the correct characteristics from the options given below:

RISC processors have simple instructions, mostly fixed length instructions and efficient pipelining.

In RISC:

Single cycle instruction execution is a characteristic.

Efficient instruction pipeline is also a characteristic.

Variable length instruction format is generally a CISC characteristic.

Instructions manipulating operands directly in memory is also generally a CISC characteristic.

So, correct statements are:

(a) and (d)