In the year ....a... the two enzymes responsible for ...b... the growth of bacteriophage in E. coli were isolated. One of these added ..c... group to DNA, while other ...d... DNA. The later was called ...e...
A. a - 1963, b - promoting, c -ethyl, d-join, e-DNA ligase
B. a-1963, b-restricting, c-methyl, d-join, e-DNA ligase
C. a-1972, b-restricting, c-methyl, d-cut, e-restriction endonucleases
D. a-1963, b-restricting, c-methyl, d-cut, e-restriction endonuclease