Which of the following statements is/are associated with role of enzymes in genetic engineering?

 1. Exonucleases remove nucleotides from the ends of DNA

2. Restriction endonucleases are used to form recombinant molecule of DNA

Select the answer using the code given below:

(a) 1 only
(b) 2 only
(c) Both 1 and 2
(d) Neither 1 nor 2

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