Which of the following statements is/are true? 1. Probability of acceptance decreases if acceptance number increases, when sampling size is kept constant 2. Indifferent quality range is the range between lot tolerance percent defective and acceptable quality level 3. Operating characteristics curve is the curve plotted between probability of acceptance and indifferent quality range

• A. Only 1
• B. Only 2
• C. Only 3
• D. All the above statements are true