this is about the restriction nuclease please some one help me out to find the answer

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rajcog
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this is about the restriction nuclease please some one help me out to find the answer

You have purified DNA from your recently deceased goldfish.  Which of the following restriction nucleases would you use if you wanted to end up with DNA fragments of average size around 70 kb after complete digestion of the DNA?  The recognition sequence for each enzyme is indicated in the right-hand column. “N” indicates that any nucleotide may be in this position and the enzyme will still cleave the site.
(a)        Sau3A I        GATC
(b)        BamH I        GGATCC
(c)        BsaJ I        CCNNGG
(d)        Not I        GCGGCCGC
(e)        Xza I        GAAGGATCCTTC