Match the following and choose the CORRECT answer:
(a) Kornberg et al. (1961) -(i) Triplet genetic code
(b) Khorana et al. (1968) -(ii) First synthetic DNA
(c) Nirenberg and Mathei (1961) -(iii) One gene-one enzyme hypothesis
(d) Beadle and Tatum (1941) - (iv) First artificial gene