The correct options are
A Precipitation
B Fermentation
D Partial Condensation
Firstly protein to fat ratio is brought to desired ratio followed by pasteurization. The milk is cooled and microbes like Lactobacillus lactis, Lactobacillus cremoris and Streptococcus thermophilus are added to start fermentation. Coagulum is formed by adding enzymes like rennet or protease. After this step of curd formation various other steps follow producing cheese. Aspergillus niger is used for the production of citric acid.