Which of the following statements about RNA processing in eukaryotes is INCORRECT?
A) Introns are simply excised out of pre-mRNA to produce the mature mRNA.
B) snRNP complex is used to remove introns from the pre-mRNA.
C) A poly A tail is added on to the 3' end of the mRNA.
D) A 7-methylguanosine cap is added on to the 5' end of the mRNA.
E) Processing occurs in the nucleus.