CAT2003 Re-Test: LRDI - Leaked Exam

Recently, the answers of a test held nationwide were leaked to a group of unscrupulous people. The investigative agency has arrested the mastermind and nine other people A, B, C, D, E, F, G, H and I in this matter. Interrogating them, the following facts have been obtained regarding their operation. Initially the mastermind 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 from 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. These data represent question numbers. 110. Which one among the following must have two sources? (1) A (2) B (3) C (4) D 111. How many people (excluding the mastermind) needed to make answer keys before C could make his answer key? (1) 2 (2) 3 (3) 4 (4) 5 112. Both G and H were sources to (1) F (2) B (3) I (4) None of the nine. 113. Which of the following statements is true? (1) C introduced the wrong answer to question 27. (2) E introduced the wrong answer to question 46. (3) F introduced the wrong answer to question 14. (4) H introduced the wrong answer to question 46.