If The Instruction Add R1 R2 R3 Is Executed In A System That Is #47

If the instruction, Add R1, R2, R3 is executed in a system that is pipe-lined, then the value of S is (Where S is a term of the Basic performance equation)?

This multiple choice question (MCQ) is related to the book/course gs gs103 Computer Logical Organisation. It can also be found in gs gs103 Basic Structures of Computers - Performance of a System - Quiz No.2.