Step 1: Understanding the Concept:
Marketing involves several concepts.
It is different from sales.
Step 2: Key Formula or Approach:
No specific formula.
Need to understand marketing concepts.
Step 3: Detailed Explanation:
Statement A: Marketing is based on the "right" principle - correct.
Statement B: Marketing does create exchanges - incorrect.
Statement C: Marketing finds out needs of potential buyers - correct.
Statement D: Marketing and sales are different - incorrect.
Thus, A and C are correct.
Step 4: Final Answer:
A and C are correct.
Hence, the correct option is (D).