It usually does not replicate.
It has always double stranded α-helix structure.
It is present in the nucleus of the cell.
It controls the synthesis of protein.
The correct option is B. It has always double stranded α-helix structure. Option A, C, and D are correct statements. RNA is typically single-stranded and is made of ribonucleotides that are linked by phosphodiester bonds. Hence, option B is incorrect.