Primers are
- ASmall chemically synthesized oligonucleotides of about $10-18$ nucleotides that are complementary to the region of template $DNA$
- BChemically synthesized oligonucleotides of about $10-18$ nucleotides that are not complementary to the region of template $DNA$
- CThe double-stranded $DNA$ that need to be amplified
- DSpecific sequences present on recombinant $DNA$
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