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Hi Pradeep Pandit, just want to make a suggestion. I know that for open-ended questions, each person is entitled to three tries to answer it but it seems that you only provided two options which means there should be no problem answering the question correctly. I suggest you give two options instead using the 'multiple choice' option when you formulate the problem. For multiple choice questions, each person is ONLY entitled to ONE try. I believe the question will be more meaningful if you do that.