Cistron can be defined as:

In the given transcription unit, identify the regions $\mathrm{I}$ and $\mathrm{II}$ respectively. Coding strand

Two of the following statements are correctly defined. Identify the correct combination

i) Conversion of hnRNA to mRNA - processing

ii) Removal of introns and joining of exons - splicing

iii) Addition of adenylate residues to $3\text{'}$- end in a template dependent manner - Tailing

iv) Methyl adenosine triphosphate is added to $5\text{'}$ - end of hnRNA - capping

Match the animals of Column $\mathrm{I}$ with Column $\mathrm{II}$ and select the correct options among the following:

Select the code for the correct answer from the options given below.