Which one of the following statements stores the value 567 in the macro variable CODENUM?

Given the following SAS statement:

%let idcode = Prod567;

Which one of the following statements stores the value 567 in the macro variable CODENUM?
A . %let codenum = substr(&idcode,length(&idcode)-2);
B . %let codenum = substr(&idcode,length(&idcode)-3);
C . %let codenum = %substr(&idcode,%length(&idcode)-2);
D . %let codenum = %substr(&idcode,%length(&idcode)-3);

View Answer

Answer: C