6
8
12
4
The correct option is (C): 12.
In the hexagonal close-packed (hcp) structure, the coordination number is 12. As zinc (Zn) adopts the hcp structure, it has 12 nearest neighbors, with six located within the same plane, and three situated above and three below that plane.
Given below are two statements:
Statement I: Transfer RNAs and ribosomal RNA do not interact with mRNA.
Statement II: RNA interference (RNAi) takes place in all eukaryotic organisms as a method of cellular defence.
In the light of the above statements, choose the most appropriate answer from the options given below: