Need explanation of sample question

5/26/2016 9:50:50 AM
Hi guys.
I recently went through the sample question paper on usmle website. Unfortunately no explanations were provided.
Can someone explain the answer of question no. 30 from block one?
I'm posting the question here but you will have to check the options (pictoral) from the paper itself.
Thanking you all in anticipation.

A 25-year-old woman comes to the physician because of a 10-year history of frequent occurrences of fever blisters. Physical
examination shows perioral vesicles. Microscopic examination of culture of scrapings from three vesicles shows herpes
simplex virus 1. Which of the following patterns in the figure shown was most likely observed when the viral DNA from the
cultures was examined by restriction enzyme analysis on polyacrylamide gels?


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