Question

Which of the following two groups of people have identical sources?
(i) A, D and G
(ii) E and H

• A. Only (i)
• B. Only (ii)
• C. Neither (i) or (ii)
• D. Both (i) and (ii)

Answer 1

The correct option is D Both (i) and (ii)

If a person copies from one source, he must have the same blank answers as the source and exactly one wrong answer more than the source (as the copier has introduced one wrong answer on his own). If the person copies from two sources, the distinct wrong answers from the two sources would be left blank by the copier and the same wrong answers in the two sources would be copied as they are.
A, D and G have one distinct wrong answer and no blank answers. So, they must have the same source. E and H also have a common wrong answer and no blanks.
Hence, both groups had identical sources.
A, D & G's source - Mastermind
B's source - E & G
C's source - I
E & H's source - A
F's source - E & H
I's source - D & E