Go through the following statements
(i) 2'-OH group present at every nucleotide in RNA makes RNA labile and easily degradable.
(ii) The transcription and translation can be coupled in bacteria
(iii) the promoter is located towards the 5'-end while terminator is located towards the 3'end of the template strand.
(iv). In lac operon, the z gene codes for betagalactosidase, y gene codes for permease while i gene codes for the inducer.
Which of these are correct statement: