Correct Answer - Option 2 : Saw : Carpenter
The logic is:
Pair of professionals and their tools as follows:
First Profession : second Tool
A. Chef : Knife → Profession : Tool
B. Saw : Carpenter → Tool : Profession
C. Sculptor : Chisel → Profession : Tool
D. Doctor : Stethoscope → Profession : Tool
Thus, Saw : Profession is different from other options.
Hence, Saw : Carpenter is the correct answer.