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Answer the questions on the basis of the following information.

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.

 Name Wrong Answer(s) Blank answer(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 17, 26, 90

Which of the following two groups of people has identical sources?

1. A, D and G
2. E and H
1. Only (I)
2. Only (II)
3. Neither (I) nor (II)
4. Both (I) and (II)

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