Choose the sequence of steps that describes the best synthesis of 1-butene from ethanol:
(i) NaC≡CH; (ii) H2, Lindlar Pd
(i) NaC≡CH; (ii) Na,NH3
(i) HBr, heat; (ii) NaC≡CH; (iii) H2, Lindlar catalyst
(i) HBr, heat; (ii) KOCCH33,DMSO; (iii) NaC≡CH; (iv) H2, Lindlar catalyst