Arrange the following events for the synthesis of RNA in the correct order:1) Nucleophilic attack of the 3′ OH group of the first nucleotide at the α-phosphate group of the second nucleotide 5′ triphosphate occurs.2) Template specific rNTPs are bound.3) Several DNA bases are unwound, forming a stable complex.4) Polymerase finds a promoter region.5) A Mg+2-dependent isomerization of DNA takes place.Options:a) 4, 2, 3, 5, 1b) 4, 3, 2, 5, 1c) 4, 1, 3, 2, 5d) 4, 3, 5, 2, 1