Step 1: Understanding the Concept:
The question asks for the common characteristic among pitcher, dusra, and bunker.
Step 2: Detailed Explanation:
Pitcher is a term in baseball, dusra is a delivery in cricket, and bunker is a hazard in golf/polo. All are terms specific to different sports.
Step 3: Final Answer:
Therefore, the correct option is (C) They are sports terms.