Question 38

The investigative body has arrested the mastermind called 'JEJO' and nine other people namely Abhay, Bhanu, Chandu,Dheeraj,Ekansh, Faisal, Girdhar, Harmeet and Ishant in a recent matter wherein the answers of a test held nationwide were leaked to a group of unscrupulous people.Interrogating them, the following facts have been obtained regarding their operation. Initially 'JEJO' obtains the correct answer-key. All the others create their answer-key from one or two people who already possess the same. These people are called his/her "sources". If the person has two sources, then he/she compares the answer-keys obtained for both sources. If the key to a question from both sources is identical, it is copied, otherwise it is left blank. If the person has only one source, he/she copies the source's answers into his/her copy. Finally, each person compulsorily replaces one of the answers (not a blank one) with a wrong answer in his/her answer key.

The paper contained 200 questions; so the investigative agency has ruled out the possibility of two or more of them introducing wrong answers to the same question. The investigative agency has a copy of the correct answer key and has tabulated the following data which represents question numbers.