Statement $II :$ $'AAA'$ and $'AAG'$ both codons code for the amino acid lysine.
In the light of the above statements, choose the correct answer from the options given below.
$i. r-RNA$ provides the template for synthesis of proteins.
$ii.$$ t-RNA$ brings amino acids and reads the genetic code.
$iii. $$RNA$ polymerase binds to promoter and initiates transcription.
$iv. $A segment of $DNA$ coding for polypeptide is called intron.