Explanation :
Bioinformatics is the science that manages the database, digital tools and software used by both medicine and forensic science to store and analyze DNA.
It involves the use of computers to collect all the data and organize data. It also develops methods and computational tools for understanding biological data.
It helps in tracing the evolution of organism using DNA and builds a computational model.
There is synthesis
decomposition
double displacement
single displacement
combustion
metathesis
so i guess you could say 6
Its B. Hope this helped :) ♥♥