question_answer

Direction: Recently, the answers of a test held nationwide were leaked to a group of unscrupulous people. The investigative agency has arrested the mastermind at nine other people, A. B, C, D, E, F, G, H and I this matter. Interrogating 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 already possess the same. These people are called his/her 'source'. If the person has two sources, then he/she compares the answer-key obtained for both sources. If the key to a question from hot sources is identical, it is copied, and otherwise it is left blank. If the person has only one source, he/she copies the source answer 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 question; so the investigative agency has ruled out the possibility of two or more 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. This data represents question numbers.

Name Wrong Answer(s) Blank Answers (s) A 46 — B 96 46,90,25 C 27,56 17,46,90 D 17 — E 46,90 — F 14,46 92,90 G 25 — H 46,92 — I 27 14,26,90

How many people (excluding the mastermind) needed to make answer keys before C could make his answer key?

A) 2            

B) 3

C) 4            

D) 5