18. Which of the following description about splicing is NOT TRUE?(A) RNA splicing needs spliceosomes which contain snRNA and proteins(B) U2 snRNA mismatches the branch point A to allow the A attacking a G residue at the 5' site of the intron(C) The 5' splice site is first recognized by U1 snRNA, then by U2 snRNA to increase the accuracy of 5' site selection(D) U6 snRNA brings 5' site close to the branch point(E) U5 snRNA brings 5' exon and 3' exon close for phosphoryl transfer reaction