In sanger’s method of DNA sequence determination, DNA synthesis is stopped by using
(A) 1′, 2′- Dideoxyribonucleoside triphosphates
(B) 2′, 3′- Dideoxyribonucleoside triphosphates
(C) 2′, 4′- Dideoxyribonucleoside triphosphates
(D) 2′, 5′ - Dideoxyribonucleoside triphosphates