Which two samples are most likely to have come from the same person

Answer:
a person can only inherit one sample from each parent, therefore, no two samples came from the same person B.
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Answer:
Option D, 1 and 6
Explanation:
If analysed properly one could see that the pattern generated in the DNA finger printing of the sample 1 and 6 are exactly the same.
In normal DNA testing, two individual have to match up to 99.99% in order to show that they belong to a common ancestry.
Since, both the sample 1 and 6 have the same graph as compared to others it is clear that sample 1 and 6 has come from the same person.
Thus, option D is correct.