Central dogma in molecular biology is

The correct option is B DNA -----> RNA ---> Protein
The central dogma of molecular biology illustrates the primary scheme for how genetic instruction progress from a DNA arrangement to a protein product inside the cells. Central dogma represents a two-step process, that is transcription and translation. Transcription is the process by which DNA is copied to RNA and translation is the process by which the copied RNA is used to produce proteins (DNA -----> RNA ---> Protein).

So, the correct answer is option B.